Tools

Fetch any URL server-side and instantly see its declared canonical tag, whether it matches the fetched URL, and whether the page redirected. Free online SEO tool.

Generate JSON-LD structured data markup for Article, Product, or FAQ schema types from a simple form. Free and runs entirely in your browser.

Generate hundreds of long-tail keyword suggestions and content ideas for free with our powerful SEO keyword generator. Simply enter a seed phrase and get instant variations.

Generate a valid robots.txt file with Allow/Disallow rules and a Sitemap directive from a simple form. Free and runs entirely in your browser.

Free robots.txt tester and validator. Check Disallow/Allow rules per user-agent, catch blocked pages instantly, and fix crawl errors before Google does.

Paste your sitemap.xml and instantly validate it against the sitemaps.org protocol, catching missing loc tags, bad priority values, and invalid changefreq entries. Free and runs entirely in your browser.

Enter a title, description, and image to see a live preview of how your page will look when shared on Facebook, Twitter/X, and LinkedIn. Free and runs entirely in your browser.

Convert any text into a clean, SEO-friendly URL slug. Perfect for blog posts, product pages, and website URLs.

Build a UTM-tagged tracking URL with source, medium, campaign, term, and content parameters for Google Analytics campaign tracking. Free and runs entirely in your browser.

Generate Apache mod_alias Redirect rules (301 or 302) for your .htaccess file from a simple form. Free and runs entirely in your browser.

Check whether any URL returns a working response or a broken status code, server-side. Free online link health checker.

Paste a raw Set-Cookie header string and instantly see its name, value, and every attribute (Expires, Domain, Path, Secure, HttpOnly, SameSite) broken down. Free and runs entirely in your browser.

View your own browser's HTTP headers or analyze the headers of any public website. Professional HTTP request and response header inspector.

Follow a URL's full redirect chain server-side and see every hop, status code, and the final destination. Free online redirect tracer.

Build a properly URL-encoded query string from key/value pairs using a simple form. Free and runs entirely in your browser.

Paste any URL and instantly see its protocol, host, port, path, query parameters, and hash broken down into readable parts. Free and runs entirely in your browser.

Paste any User-Agent string and instantly decode the browser, operating system, rendering engine, and device type. Free and runs entirely in your browser.

Discover how unique your browser is. Analyze and view the hardware, software, and behavioral signals that websites use to track you without cookies.

Inspect this page's live localStorage, sessionStorage, and accessible cookies in a readable table. Free and runs entirely in your browser.

Build a Content-Security-Policy header string from a checklist of common directives. Free and runs entirely in your browser.

Search the WHOIS database for domain registration details, registrar information, and expiration dates.

Generate an Apache .htpasswd line ({SHA} format) from a username and password, computed locally with the Web Crypto API. Free and runs entirely in your browser.

Audit password strength entirely in your browser with live entropy-bit calculation, crack-time estimates across hardware scales, and common pattern detection. 100% client-side, nothing is ever transmitted.

Check any domain's SSL/TLS certificate details server-side — issuer, subject, expiry date, and SAN list. Free online SSL checker.

Check a domain's SPF, DMARC, and MX DNS records to verify its email deliverability configuration. Free online email authentication checker.

Validate an email address's syntax and get a clear explanation of exactly why it's invalid if it fails. Free and runs entirely in your browser.

Paste raw email headers to identify the true sender, understand routing hops, and analyze email security protocols like SPF, DKIM, and DMARC.

Check the contrast ratio between two colors against WCAG AA and AAA accessibility standards, computed instantly in your browser.

Paste HTML and a CSS selector to instantly see how many elements match and preview each one. Free and runs entirely in your browser.

Easily convert your SRT (.srt) subtitle files to WebVTT (.vtt) format with our free online tool. Perfect for HTML5 video players and web accessibility.

Convert VTT to SRT instantly with our free VTT to SRT converter. Fast, secure, and 100% browser-based — no uploads, no signup required.

Convert an AVIF image to JPG or PNG entirely in your browser using the Canvas API. Free, fast, and 100% client-side.

Paste a Base64 string or data URI and convert it back into a downloadable image instantly in your browser. Free and 100% client-side.

Convert a HEIC/HEIF photo (the default iPhone camera format) to JPG or PNG entirely in your browser. Works in Safari; other browsers may not support HEIC decoding.

Convert an uploaded image into a Base64 data URI instantly in your browser, ready to paste into CSS, HTML, or JSON. Free and 100% client-side.

Convert a JPG image to PNG format instantly in your browser, then download the result. Free and 100% client-side.

Convert a JPG image to WebP format instantly in your browser, then download the result. Free and 100% client-side.

Convert a PNG image to JPG format instantly in your browser, then download the result. Free and 100% client-side.

Convert a PNG image to WebP format instantly in your browser, then download the result. Free and 100% client-side.

Rasterize an uploaded SVG vector file into a PNG at a custom pixel size, then download the result. Free and 100% client-side.

Convert a WebP image to JPG format instantly in your browser, then download the result. Free and 100% client-side.

Convert a WebP image to PNG format instantly in your browser, then download the result. Free and 100% client-side.

Center-crop and resize an uploaded image to a common aspect ratio like 16:9, 4:3, or 1:1, then download the result. Free and 100% client-side.

Shrink an image's file size by re-encoding it at an adjustable quality level, then download the compressed result. Free and 100% client-side.

Drag to select a region of an uploaded image and crop it down, then download the result. Free and 100% client-side.

Flip an uploaded image horizontally or vertically to create a mirror image, then download the result. Free and 100% client-side.

Resize an uploaded image to exact pixel dimensions, with optional aspect-ratio lock, then download the result. Free and 100% client-side.

Rotate an uploaded image by 90, 180, or 270 degrees, then download the result. Free and 100% client-side.

Split an image into equal rows and columns -- perfect for Instagram grid posts or puzzle tiles -- and download each piece individually. Free and 100% client-side.

Overlay custom text as a semi-transparent watermark onto an uploaded image, then download the result. Free and 100% client-side.

Apply an adjustable Gaussian blur to an uploaded image, then download the result. Free and 100% client-side.

Adjust an uploaded image's brightness and contrast live with sliders, then download the result. Free and 100% client-side.

Convert an uploaded image to grayscale using perceptual luminance weighting, then download the result. Free and 100% client-side.

Apply a mosaic/pixelation effect to an uploaded image with an adjustable block size, then download the result. Free and 100% client-side.

Convert an uploaded image into text-based ASCII art with an adjustable width, then copy the result. Free and 100% client-side.

Extract the most common colors from an uploaded image as a copyable hex swatch palette. Free and 100% client-side.

Click anywhere on an uploaded image to sample the exact pixel color as a hex and RGB value. Free and 100% client-side.

Instantly view an uploaded image's width, height, aspect ratio, megapixel count, file size, and type. Free and 100% client-side.

Center-crop and resize an uploaded image down to a square favicon PNG at a common icon size, then download it. Free and 100% client-side.

Extract text from images instantly with our free online OCR tool. No registration required, all processing happens safely in your browser.

Strip comments, metadata, and unnecessary whitespace from SVG markup to shrink file size. Free and runs entirely in your browser.

Convert ASCII character codes into their equivalent binary (Base-2) representation. Essential tool for studying character maps, digital encoding, and low-level computer science fundamentals.

Convert ASCII character codes (Base-10) back into human-readable text. Professional tool for restoring data from logs, debugging character streams, and interpreting legacy digital signals.

Decode Base32 (RFC 4648) strings back into readable plain text instantly in your browser. Perfect for verifying TOTP secrets and DNS-safe encoded data.

Encode plain text into Base32 (RFC 4648) format instantly in your browser. Ideal for TOTP/2FA secrets, DNS-safe identifiers, and case-insensitive data encoding.

Convert binary bitstreams (0s and 1s) back into standard ASCII decimal codes. Professional tool for deconstructing digital protocols, debugging data streams, and verifying register outputs.

Free binary to decimal converter. Convert any binary number to decimal instantly with bit/byte stats - built for networking, code, and CS students.

Convert binary code (0s and 1s) to hexadecimal format. Instant, free online tool for byte representation and memory analysis.

Convert binary numbers (Base-2) into octal (Base-8) format. Professional tool for legacy system analysis, file permission calculation, and bit grouping.

Decode binary code (0s and 1s) back into human-readable plain text. Professional tool for data recovery, debugging binary protocols, and understanding character encoding.

Convert decimal numbers (Base-10) to binary code (Base-2). Fast and accurate tool for system analysis, bitwise operation planning, and hardware interfacing.

Convert decimal numbers (Base-10) to hexadecimal (Base-16). Fast, free, and accurate online tool for developers, designers, and students.

Convert decimal numbers (Base-10) to octal (Base-8) format. Professional tool for system administration, legacy software maintenance, and mathematical exploration.

Convert a sequence of decimal numeric codes back into readable text.

Convert hexadecimal (HEX) values to binary code easily. Precision tool for software debugging, color analysis, and low-level computing.

Free hex to decimal converter. Convert any hex value to dec instantly with bit/byte breakdown - ideal for colors, memory addresses, and code.

Convert hexadecimal (Base-16) numbers into octal (Base-8) format. Professional tool for low-level system analysis, legacy code conversion, and bitwise mapping.

Convert hexadecimal strings back into readable plain text.

Decode HTML entities (&, <, é, etc.) back into their original readable characters instantly in your browser.

Convert special characters into HTML entities (&, <, >, etc.) to safely embed text inside HTML markup. Free and runs entirely in your browser.

Translate International Morse Code back into readable plain text instantly in your browser. Supports letters, numbers, and common punctuation.

Translate plain text into International Morse Code instantly in your browser. Supports letters, numbers, and common punctuation.

Convert any text into the NATO phonetic alphabet (Alpha, Bravo, Charlie...) instantly in your browser. Useful for spelling names and codes clearly over radio or phone.

Convert a number into written-out English words -- perfect for checks, invoices, and legal documents. Free and runs entirely in your browser.

Convert octal numbers (Base-8) to binary code (Base-2). Professional tool for file permission analysis, digital circuit design, and bitwise operations.

Convert octal numbers (Base-8) to decimal numbers (Base-10). Professional tool for mathematical computing, system configuration analysis, and numerical base exploration.

Convert octal numbers (Base-8) to hexadecimal (Base-16). Professional tool for cross-platform data mapping, legacy system integration, and firmware analysis.

Convert octal number sequences (Base-8) back into readable plain text. Professional tool for forensic data recovery, legacy message decoding, and bitwise string analysis.

Convert human-readable text strings into their standard ASCII decimal codes (Base-10). Professional tool for investigating character encoding, preparing data for scripts, and understanding computer science mapping.

Convert plain text strings into binary code (Base-2). Professional tool for understanding digital data representation, encoding messages, and exploring computer science fundamentals.

Convert plain text strings into a sequence of decimal numeric codes (Base-10). Professional tool for auditing character encodings, debugging string data, and learning numeric mapping.

Convert plain text strings into hexadecimal code (Base-16). Professional tool for auditing character encodings, debugging web data, and learning hexadecimal mapping.

Convert plain text strings into a sequence of octal numbers (Base-8). Professional tool for analyzing legacy encoding schemes, file permission mapping, and computer science study.

Convert Unix epoch timestamps to human-readable dates and back, live, in your browser. Instantly see the ISO 8601, UTC, local, and relative time for any timestamp.

Decode percent-encoded (URL-encoded) text back into its original readable form instantly in your browser. Free and private.

Percent-encode text or full URLs for safe use in query strings, links, and API requests. Fast, free, and runs entirely in your browser.

Quickly decode your Base64 strings back to plain text with our free online tool. Safe, fast, and secure processing entirely within your browser.

Quickly encode your plain text or binary data into Base64 format with our free online tool. Perfect for data transmission and storage.

Generate a standard .ics calendar event file from a title, date, time, and location -- importable into Google Calendar, Outlook, and Apple Calendar. Free and 100% client-side.

Generate a standard vCard (.vcf) contact file from a name, phone, email, and address -- ready to import into any contacts app. Free and 100% client-side.

Convert colors between HEX, RGB, HSL, and CMYK formats with our free online tool. Accurate color translations for web design and digital art.

Convert HEX color codes to RGB values instantly. Our free tool provides accurate RGB components for any valid hexadecimal color string.

Convert RGB values to HEX color codes instantly. Our free tool provides accurate hexadecimal translations for any valid RGB component combination.

Encode or decode text with ROT13 or a custom Caesar cipher shift, computed instantly in your browser. Free and works entirely client-side.

Convert between length, mass, temperature, area, and volume units instantly with shareable, URL-addressable results. 100% client-side and free.

Look up the Autonomous System Number (ASN) and owning organization for any public IP address. Free online ASN lookup tool.

Check a DNS record against Google, Cloudflare, Quad9, and OpenDNS public resolvers simultaneously to see if a change has fully propagated. Free online DNS propagation tool.

Look up A, AAAA, MX, TXT, NS, or CNAME DNS records for any domain in real time. Free online DNS lookup tool.

Check whether an IPv4 address is listed on major public DNSBL/RBL spam blocklists (Spamhaus, SpamCop, Barracuda). Free online IP reputation checker.

Measure the server-side HTTP round-trip time to any website — a browser-friendly substitute for ping. Free online latency checker.

Check your IP address or query any IPv4/IPv6 address to find its geographic location, ASN, and proxy status.

Determine if an IP address belongs to a known Proxy, VPN, Tor exit node, or data center.

Perform a reverse DNS lookup to find the hostname associated with any IPv4 or IPv6 address. Quick, accurate, and free PTR record check.

Resolve a shortened URL (bit.ly, t.co, tinyurl, and more) to its final destination server-side before clicking it. Free online link expander.

Instantly find out your public IPv4 or IPv6 address, geographic location, ASN, and proxy status.

Merge a list of CIDR blocks into the minimal set of covering supernets. Free and runs entirely in your browser.

Convert a CIDR block (e.g. 10.0.0.0/24) into its network, broadcast, and usable IP range instantly. Free and runs entirely in your browser.

Sort a list of IPv4 addresses numerically (not alphabetically), with optional deduplication and descending order. Free and runs entirely in your browser.

Convert a dotted-decimal IPv4 address to hexadecimal notation, or decode a hex value back to an IP address. Free and runs entirely in your browser.

Convert a first-last IP address range into the minimal set of covering CIDR blocks. Free and runs entirely in your browser.

Validate an IPv4 address and classify it as public, private, loopback, link-local, multicast, or reserved. Free and runs entirely in your browser.

Convert a dotted-decimal IPv4 address to its 32-bit binary octet representation, or back again. Free and runs entirely in your browser.

Compress a full-form IPv6 address to its shortest valid :: representation. Free and runs entirely in your browser.

Expand a compressed IPv6 address (using ::) to its full 8-group form. Free and runs entirely in your browser.

Validate an IPv6 address and classify it as global unicast, unique local, link-local, multicast, or loopback. Free and runs entirely in your browser.

Convert between a dotted-decimal subnet mask (255.255.255.0) and CIDR prefix notation (/24) instantly. Free and runs entirely in your browser.

Convert an internationalized domain name (IDN) with non-ASCII characters to its ASCII Punycode (xn--) form. Free and runs entirely in your browser.

Normalize a MAC address between colon, hyphen, Cisco-dot, and plain notation instantly. Free and runs entirely in your browser.

Decode a Punycode (xn--) ASCII hostname back to its original Unicode internationalized domain name. Free and runs entirely in your browser.

Generate a random IPv4 address, optionally constrained to a specific CIDR range. Free and runs entirely in your browser.

Generate a cryptographically random MAC address, with an optional locally-administered or multicast bit. Free and runs entirely in your browser.

Generate a firewall-rule-ready list of ports from single values and ranges, with automatic compression. Free and runs entirely in your browser.

Look up the meaning and category of any HTTP status code, from 100 to 599. Free and runs entirely in your browser.

Look up a MIME type from a file extension, or find the file extension(s) for a MIME type. Free and runs entirely in your browser.

Look up the standard service name for a well-known TCP/UDP port, or search ports by service name. Free and runs entirely in your browser.

Convert Comma Separated Values (CSV) to structured JSON data easily.

Compare two JSON objects and see exactly which keys were added, removed, or changed -- ignores key order. Free and runs entirely in your browser.

A lightweight, simple tool to edit and refine your JSON data directly.

Compress your JSON data to the smallest size for optimal storage and transport. Remove all unnecessary whitespace instantly.

Prettify and format messy JSON instantly. Free, browser-based JSON formatter with syntax highlighting and error detection.

Flatten JSON arrays into Comma Separated Values (CSV).

Convert a JSON array of objects into ready-to-use HTML table markup instantly in your browser. Perfect for quickly embedding structured data into a web page.

Convert JSON data into plain, human-readable text.

Convert JSON arrays into Tab Separated Values (TSV).

Convert JSON data structures into XML formats.

Convert JSON data into clean, indented YAML instantly in your browser. Perfect for Kubernetes manifests, CI/CD configs, and Docker Compose files.

Check if your JSON is valid according to RFC 8259 standards. Get detailed error reports and syntax validation instantly.

View, explore, and prettify JSON data with syntax highlighting.

Generate realistic fake JSON test data — names, emails, dates, prices, and more — with a field picker and an optional seed for reproducible results. Free and runs entirely in your browser.

Convert Tab Separated Values (TSV) to structured JSON data efficiently.

Transform structured XML data into the more flexible JSON format.

Convert YAML configuration files into standard JSON instantly in your browser. Ideal for feeding YAML config into JSON-only APIs or scripts.

Validate YAML syntax instantly in your browser and get a clear error message with line number if something's wrong. Free and private.

Beautify and pretty-print raw, minified CSS with proper indentation. Free and runs entirely in your browser.

Beautify and pretty-print raw, minified HTML with proper indentation. Free and runs entirely in your browser.

Beautify and pretty-print raw, minified JavaScript with proper indentation. Free and runs entirely in your browser.

Convert Markdown to HTML and HTML back to Markdown in real time with a live preview. 100% client-side, nothing you type is ever saved or tracked.

Beautify and pretty-print raw, minified SQL queries with proper indentation and keyword casing. Free and runs entirely in your browser.

Generate a combined .gitignore file from common languages, frameworks, and editors with a simple checklist. Free and runs entirely in your browser.

Paste a 5-field cron expression and get a plain-English explanation plus the next 5 scheduled run times. Free and runs entirely in your browser.

Convert comma-separated values (CSV) into tab-separated values (TSV) instantly in your browser. Useful for pasting data into spreadsheet tools that expect tabs.

Build a properly shell-escaped curl command from a method, URL, headers, and request body. Free and runs entirely in your browser.

Convert tab-separated values (TSV) into comma-separated values (CSV) instantly in your browser. Useful for preparing spreadsheet exports for CSV-only import tools.

Quickly convert text to UPPER CASE, lower case, Sentence case, Capitalized Case, camelCase, PascalCase, or snake_case with our free online tool.

Randomly shuffle the lines of a pasted list using the Fisher-Yates algorithm. Free, fast, and runs entirely in your browser.

Free Lorem Ipsum generator for designers and developers. Create custom paragraphs, sentences, or words of placeholder text instantly.

Generate random words instantly for brainstorming, creative writing, or learning. Choose the number of words and word types with our free online tool.

Quickly remove or replace line breaks in your text. Perfectly format text copied from PDFs, emails, or websites with our free online tool.

Compare two blocks of text line by line and instantly see what was added, removed, or unchanged. Free and runs entirely in your browser.

Count words, characters, sentences, and paragraphs in real-time. Estimate reading and speaking time for your content with our free online tool.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text, computed locally with the Web Crypto API. Free and runs entirely in your browser.

Decode a JWT's header and payload instantly and check its expiration, computed locally in your browser. Free, no signup, and your token is never sent to a server.

Generate high-entropy, secure passwords instantly with our free online tool. Customize length and characters to protect your digital accounts.

Test JavaScript regular expressions in real time with live match highlighting, capturing group breakdowns, and instant replacement previews. 100% client-side.

Generate cryptographically random RFC 4122 v4 UUIDs online, one at a time or in bulk. Free, fast, and runs entirely in your browser.

Flip a virtual coin and keep a running tally of heads versus tails. Free and 100% client-side.

Get a random classic pun-style dad joke with a punchline reveal. Free and 100% client-side.

Ask a yes-or-no question and get a random fortune-telling style answer, just like a classic Magic 8-Ball. Free and 100% client-side.

Enter a list of options and spin an animated wheel to pick one at random. Free and 100% client-side.

Generate a random inspirational, wise, or funny quote with attribution, filterable by category. Free and 100% client-side.

Enter a list of names and randomly split them into evenly-sized teams. Free and 100% client-side.

Enter a list of participant names and randomly assign gift-giving pairs, with nobody assigned to themselves. Free and 100% client-side.

Generate a standard single-elimination tournament bracket with proper seeding and byes from a list of participants. Free and 100% client-side.

Get a random trivia question with a reveal-on-demand answer, filterable by category. Free and 100% client-side.

Get a random creative writing prompt to spark a short story, filterable by genre. Free and 100% client-side.

Turn any word into a fun backronym by expanding each letter into a random positive word. Free and 100% client-side.

Generate random baby name suggestions from a curated list of popular names, filterable by gender and starting letter. Free and 100% client-side.

Generate a set of relevant hashtags from a topic, combining input-derived tags with curated category suggestions. Free and 100% client-side.

Generate a unique, deterministic identicon avatar from any text seed, then download it as a PNG. Free and 100% client-side.

Generate random full names from curated first and last name lists, filterable by gender. Free and 100% client-side.

Generate unique username suggestions from an adjective-noun combination or based on your own name, with an optional random number. Free and 100% client-side.

Turn any word or short phrase into large block-letter ASCII art, ready to paste into code comments, READMEs, or chat. Free and 100% client-side.

Generate a downloadable barcode (CODE128, EAN-13, or UPC) from text or numbers. Free and 100% client-side.

Add classic bold, white, black-outlined top and bottom text to any image and download the result. Free and 100% client-side.

Generate a downloadable QR code from any text or URL, with adjustable size and error correction level. Free and 100% client-side.

Upload an image containing a QR code to decode its text content, then copy the result. Free and 100% client-side.

Generate a random, harmonious color palette using complementary, analogous, triadic, or monochromatic color schemes. Free and 100% client-side.

Build a CSS border-radius with independently adjustable corners and a live preview. Free and 100% client-side.

Build a CSS box-shadow with adjustable offset, blur, spread, color, and opacity, with a live preview. Free and 100% client-side.

Build a linear or radial CSS gradient with a live preview, then copy the generated CSS. Free and 100% client-side.

Generate a random, memorable multi-word passphrase from a curated word list using cryptographically secure randomness. Free and 100% client-side.

Run a work/break countdown timer using the Pomodoro Technique, with adjustable interval lengths and a session counter. Free and 100% client-side.

Generate a Sudoku puzzle with a guaranteed unique solution at three difficulty levels -- print it, solve it in your browser, or reveal the answer. Free and 100% client-side.