Format JSON
Paste ugly, copy pretty
Format JSON launched on May 21, 2026 with 2 votes, #6,288 of 20,538 launches that month.
What it does
Format, beautify, and validate JSON instantly — right in your browser. Paste raw JSON and get clean, readable output in one click. Minify for production, compare with diff, explore with an interactive tree viewer, or convert to YAML and CSV. No sign-up, no install, no data sent to any server. 100% client-side, fast, and free. Built for developers who value speed and privacy.
Format JSON online — beautify, validate, minify & compare JSON. Tree viewer, diff tool, code generator. 100% client-side, data never leaves your browser.
Load JSON from URL The URL must support CORS or be a public API endpoint. Uncheck fields to hide them from the tree view. Arrays appear once. Format JSON online for free — paste, upload, or fetch JSON data and instantly beautify it into readable, indented code. Minify JSON for production use with one click. All processing happens in your browser — nothing is sent to a server. As you type or paste, the editor validates your JSON in real time. Syntax errors are displayed immediately with descriptive messages, helping you quickly locate and fix malformed data like missing commas, unquoted keys, or trailing brackets. Switch to the Tree Viewer tab to explore your data as a collapsible hierarchy.…from format-json.net
Does a similar job
all alternatives →
Quick JSON Formatter2023 · chromewebstore.google.com · ▲72Quickly formats JSON with a simple right click, no copy
JSON FormatterMay 2026 · formatjson.online · ▲2Beautify, validate & convert JSON — free, no login and fast.
JSON Formatter Online2025 · json-formatter-new.vercel.app · ▲7Free json formatter & validator online
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