Prettifies JSON and API response data with configurable indentation, sorting, and syntax validation — fixes malformed JSON and makes nested structures readable.
Profile JSON payload weight — byte size, key counts, nesting depth, and heavy branches. Find the 2 MB field bloating responses — local analysis, free, no signup.
Send HTTP requests from your browser — custom headers, bodies, params, saved collections, and one-click cURL/Fetch/Axios snippets. Developers debug a REST endpoint without leaving the tab — runs locally, free to start.
Build JSON-RPC 2.0 request envelopes with method, params, and IDs. Talk to Ethereum nodes and RPC APIs correctly — local building, free, no signup.
Markdown toolbox with four converting tabs — Markdown to HTML source, plain text to Markdown, HTML to Markdown, and Markdown to plain text. Own every .md workflow in one tab — local processing, free, no signup.
Renders a scannable QR code from any text or URL with a client-side Reed-Solomon encoder at fixed high error correction. Customize size, colors, and center logo, then download the PNG — free, local, no signup.
Format/beautify, validate, Zod schema inference, URL-param flattening, flat key-value export, JSON-LD framing, and size/structure analysis — seven tools sharing one input.
Format fixes layout; validate checks correctness. Broken JSON formats partially with errors flagged — fix flagged lines, re-run.
Minified for transit, pretty for docs, Zod for TypeScript contracts, URL params for GET requests. Generate each from the same source paste.
No — all operations run locally in your browser. Data never leaves your device.
Last updated October 2026