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Free online PDF & developer tools that stay private.

Convert, merge and unlock PDFs, turn photos into a PDF, or decode a JWT — all in your browser. No accounts, no watermarks, and your files never leave your device.

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Glowing PDF, document, search and audio icons floating around a computer screen that shows a file browser

Developer Tools

Cron Expression Explainer

Paste a cron expression and read it as a sentence, with the next 5 run times. Handles Unix, Quartz, Spring and AWS EventBridge. Free, runs in your browser.

Developer Tools

Claude vs GPT vs Gemini API Cost Calculator

Compare what the same usage costs on Claude, GPT and Gemini. Enter tokens and requests, get the monthly cost per model. Free, no sign-up, runs in your browser.

Image Tools

Bulk Image Converter: WebP, PNG, JPG and AVIF

Free bulk image converter. Turn WebP, AVIF, PNG and JPG into PNG, JPG or WebP, keep transparency, preview each file and download a ZIP. Runs in your browser.

Developer Tools

.env Diff Checker

Compare two .env files online. See missing, different and empty variables by name, with values hidden by default. Free, runs in your browser.

Developer Tools

cURL to fetch, Axios and TypeScript Converter

Paste a curl command and get ready-to-use fetch(), Axios or typed TypeScript code. Headers, JSON and form bodies included. Free, runs in your browser.

Image Tools

PNG and JPG to SVG Converter

Free PNG, JPG and WebP to SVG converter. Trace logos, icons and art into a clean, colour SVG you can edit or cut, with nothing uploaded.

Developer Tools

TTF to WOFF2 Converter

Free TTF to WOFF2 converter. Turn TTF and OTF fonts into WOFF2 or WOFF in bulk, preview each font and copy ready @font-face CSS. Nothing is uploaded.

Image Tools

PNG and JPG to WebP Converter

Free bulk PNG and JPG to WebP converter. Preview every image, keep transparency, choose lossy or lossless, and download one file or a ZIP. Runs in your browser.

Developer Tools

Next.js Middleware Matcher Tester

Test your Next.js middleware or proxy matcher against real routes. See which paths run, which are excluded, and the regex Next.js builds. Free, in your browser.

Developer Tools

Drizzle and Prisma Schema Generator

Free Drizzle and Prisma schema generator. Convert SQL CREATE TABLE, pg_dump or mysqldump to schema.ts or schema.prisma with relations and enums. In your browser.

Image Tools

SVG to PNG Converter

Convert SVG to PNG from a link, code or file. Pick any size up to 8192px, keep a transparent background or choose a colour. Free, runs in your browser.

Developer Tools

SVG to JSX Converter

Convert SVG to a clean React component in JSX or TSX. Colours become currentColor for Tailwind and editor junk is removed. Free, runs in your browser.

Developer Tools

JSON to TypeScript and Zod Converter

Convert JSON to TypeScript interfaces or a Zod schema instantly. Detects optional fields, dates and emails. Free, no sign-up, runs in your browser.

Developer Tools

CLAUDE.md and AGENTS.md Generator

Free CLAUDE.md and AGENTS.md generator. Create Cursor rules (.mdc), GEMINI.md and Copilot instructions for Next.js, React or Python projects. No sign-up.

Developer Tools

JWT Decoder

Decode any JWT without the secret, see exactly when it expires with a live countdown, and verify HS256/RS256 signatures. Runs 100% in your browser.