Private browser formatter

Format code without leaving your browser.

Start with JSON or jump to private tools for formatting, minifying, converting, decoding, hashing, and diffing. Workflows run client-side and keep your input on this device.

All private tools JSON tools Minifiers

Next actions

Keep working from the editor.

Open another local tool or a targeted repair guide without turning the page into a directory.

Popular private tools

Open a local utility for the next snippet in your workflow.

JSON Formatter Pretty-print JSON locally. JSON Viewer Inspect JSON without upload. Python Ruff Formatter Format Python with Ruff in the browser. JavaScript Biome Formatter Format JavaScript locally. JWT Decoder Decode JWT claims locally. Hash Generator Generate SHA hashes in the browser.

Common developer fixes

Jump to focused repairs for syntax and conversion issues.

Fix JSON trailing comma Remove invalid trailing commas. Fix JSON unexpected token Repair strict JSON syntax. Fix YAML indentation Align YAML blocks correctly. Fix invalid JWT token Check token shape before decoding. Minify CSS file Compress valid CSS locally. Convert JSON to CSV Export JSON rows to CSV.

Workflow

Use JSON without sending code.

Paste a snippet, run the action, review any highlighted issue, then copy the result back to your work.

Current language
JSON
Current action
Formatter
  1. 01

    Start

    Paste a snippet or full file into the editor.

  2. 02

    Run

    Use Format code from the action bar.

  3. 03

    Review

    Fix syntax issues if processing stops.

  4. 04

    Move

    Use Copy code when the result is ready.

Input
Paste code
Use a snippet or a full file.
Format
Formatter
Clean indentation, spacing, and line breaks.
Issues
Highlighted lines
If formatting stops, fix the shown line and try again.
Result
Copy output
Move the formatted code back to your editor.