Highwayman

Every few weeks I look up and realise the list of things I've shipped has outgrown the last blog post, and this is one of those times. Since Pumpkin Pie the site has picked up more than 150 new tools and calculators, plus a few things that make the whole place nicer to use. The full lineup lives on the Tools and Calculators pages - here are the highlights, grouped by what you'd actually reach for them to do.

🛠️ New Tools

Security & Developer

• HMAC Generator - Sign a message with HMAC-SHA256, SHA-384 or SHA-512 and a secret key, computed locally in your browser.
• TOTP Generator - Generate the same six-digit two-factor codes your authenticator app shows (RFC 6238), plus an otpauth QR code.
• JWT Generator - Create and verify HS256, HS384 and HS512 JSON Web Tokens - the companion to the JWT Decoder.
• Bcrypt Generator - Hash and verify passwords with bcrypt and a configurable cost factor.
• Key Pair Generator - Generate RSA, ECDSA and Ed25519 key pairs in PEM and OpenSSH formats, entirely in your browser.
• AES Text Encryption - Encrypt and decrypt text with a password using AES-256-GCM.
• Certificate Decoder - Paste an X.509 SSL/TLS certificate or CSR and read the subject, issuer, validity dates, SANs and key details.
• CVSS Calculator - Score a vulnerability with CVSS v3.1 base, temporal and environmental metrics.
• Security Headers Analyzer - Grade a site's HTTP security headers (CSP, HSTS, X-Frame-Options and more) and see what is missing.
• SPF Record Generator - Build a valid SPF TXT record and keep it under the 10-lookup limit. Its siblings, the DKIM Record Generator and DMARC Record Generator, finish the email-authentication set.
• JSON Schema Validator - Validate JSON against a Draft-07 or 2020-12 schema and get a readable list of errors.
• JSON to TypeScript - Paste JSON, get TypeScript interfaces.
• curl to Code Converter - Turn a curl command into fetch, Python requests or axios code.
• JSONPath Tester - Evaluate JSONPath expressions (RFC 9535) against your JSON as you type.
• Chmod Calculator - Convert between Unix octal and symbolic permissions with a click-to-set grid.

Web & SEO

• Meta Tag Generator - Generate title, description, Open Graph and Twitter Card tags from a simple form.
• hreflang Tag Generator - Build the reciprocal hreflang tags a multilingual site needs, including x-default.
• SERP Snippet Preview - See roughly how your title and description will be truncated in Google results.
• URL Defanger - Defang suspicious links (hxxp, [.]) so they can be shared safely in reports and tickets - and refang them back.
• security.txt Generator - Create an RFC 9116 security.txt so researchers know how to report a vulnerability.

PDF & Image

• PDF Merger - Combine several PDFs into one. Next to it, the PDF Splitter and PDF Page Organizer cut, reorder and rotate pages - all in your browser, nothing uploaded.
• PDF to Image Converter - Render PDF pages as PNG or JPG images.
• Image to PDF Converter - Turn one or many images into a single PDF.
• Bulk Image Resizer - Resize a whole batch of images at once and download them as a ZIP.
• EXIF Metadata Remover - Strip GPS location, camera details and other EXIF data from a photo before you share it.
• Color Blindness Simulator - Preview an image the way people with different types of color vision deficiency see it.

Tests & Fun

• Webcam Test - Check your camera in the browser. The Microphone Test, Keyboard Tester and Dead Pixel Test make a complete hardware check-up.
• Typing Speed Test - Measure your words per minute and accuracy.
• Online Metronome - A steady beat for practice, with adjustable tempo and time signature. The Tone Generator makes reference pitches.
• Maze Generator - Make printable mazes of any size, with a solution. The Word Search Generator and Bingo Card Generator do the same for the rest of the party games.
• Invoice Generator - Fill in a form and print or save a clean invoice as PDF.

🧮 New Calculators

Money

• FIRE Calculator - Estimate your financial-independence number and the years left to retire early.
• Emergency Fund Calculator - Work out how many months of expenses you need set aside.
• Self-Employment Tax Calculator 2026 - Estimate self-employment tax for 2026 income.
• Loan Comparison Calculator - Put two loan offers side by side and see the true total cost of each.
• Mortgage Points Calculator - Find the break-even month for paying points to lower your rate.
• Break-Even Calculator - How many units must you sell before you make a profit?

Health

• Wilks & DOTS Calculator - Compare powerlifting totals across body weights.
• QTc Calculator - Correct the QT interval for heart rate with the common formulas.
• Mean Arterial Pressure (MAP) Calculator - Turn systolic and diastolic readings into MAP.

Math & Statistics

• t-Test Calculator - Run one-sample, two-sample and paired t-tests and read the p-value.
• Linear Regression Calculator - Fit a line to your data and get slope, intercept and R².
• Graphing Calculator - Plot functions and explore them with zoom and trace.
• Polynomial Root Solver - Find the real and complex roots of a polynomial.

Network & IT

• VLSM Calculator - Carve a network into right-sized subnets.
• SLA Uptime Calculator - Turn "99.9%" into minutes of allowed downtime.
• RAID Calculator - Usable capacity and fault tolerance for each RAID level.

Everyday & Hobby

• Recipe Scaler - Scale a recipe up or down and keep the ratios right.
• Roof Pitch Calculator - Convert between rise-over-run, degrees and percent.
• Moon Phase Calculator - See the moon phase for any date. Pair it with the Sunrise & Sunset Calculator for planning night shots.

✨ Also New Around the Site

• Site search - press Ctrl/Cmd+K (or /) anywhere and jump straight to a tool, calculator, forensics page, reference article or blog post.
• A refreshed look - one consistent design across the site, with light and dark themes that follow your device unless you pick one in the menu.
• A much bigger Reference section - cheat sheets, guides, how-tos, comparisons and a glossary. Fresh how-tos like Set Up SPF, DKIM and DMARC and Merge, Split and Reorder a PDF pair up with the tools above, and every tool page now links to the articles that explain it.
• A big fixing sweep - I went through the tools and calculators one by one, fixing dead keypads, broken gauges and a handful of stale translations.

That's the road so far. The Highwayman never really stops - and neither does the to-do list. If there's a tool you wish existed, the contact page is open.