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Dev tools · October 8, 2026

PasteKit

Format JSON, YAML & SQL privately

PasteKit launched on October 8, 2026 with 89 votes, #174 of 3,230 launches that month and more than 95% of that year's launches.

Visit pastekit.dev ↗PasteKit alternativestop 5% of October 2026

What it does

Paste JSON, YAML, XML, SQL, CSV or code and get formatted, validated output instantly. 58 formats, 48 converters and JSON tools (diff, schema, repair, jq). Everything runs in your browser, enforced by a strict CSP, so nothing you paste leaves your machine.

Paste JSON, YAML, XML, SQL, CSV or code and get pretty, validated output instantly. Auto-detects 58 formats; everything runs in your browser.

Format anything, upload nothing. Paste on the left — PasteKit detects the format and pretty-prints it on the right in milliseconds. Your data never leaves your browser. PasteKit formats, validates and converts 58 formats and 48 conversion pairs. Parsing happens in a Web Worker on your machine, so large files stay smooth and your data is never sent anywhere — verify it in your browser's network panel, or read how the Content Security Policy enforces it . Yes. All 58 formatters, 48 converters and 16 JSON tools are free to use, with no sign-up and no usage limits beyond what your browser can hold in memory. No. Everything is parsed, formatted and converted in a Web Worker inside your browser,…from pastekit.dev

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