All NeatJSON Tools and Guides

869 free browser-based tools and guides, grouped by what you want to do.

NeatJSON is a collection of small, focused utilities for developers, writers and anyone who works with data. Everything runs in your browser: what you paste or upload is processed on your device, there is no sign-up, and most tools keep working offline once the page has loaded. This directory lists each tool once, under its main address, with a one-line summary of what it does, so you can compare similar tools before opening one.

Jump to a category: Guides and tutorials (86) · JSON tools (70) · XML tools (39) · YAML, TOML, CSV and spreadsheet tools (32) · Hashing, passwords and encryption (30) · Encoding and decoding (56) · Color tools (9) · Image, PDF and media tools (51) · Network and IP tools (19) · HTML, CSS and code tools (158) · Calculators and unit converters (60) · Text tools (62) · Random generators and fun tools (197). Most people start with the JSON formatter and validator, the Base64 encoder or the URL encoder. You can also use your browser's find (Ctrl or Cmd + F) to search the list.

Guides and tutorials

Step-by-step articles that explain the format or task behind a tool, with worked examples.

JSON tools

Format, validate, view, diff and convert JSON, plus JWT and JSON query tools.

XML tools

Beautify, validate, transform and convert XML, SOAP and WSDL documents.

YAML, TOML, CSV and spreadsheet tools

Validate YAML and convert between YAML, TOML, CSV, TSV and spreadsheets.

Hashing, passwords and encryption

Compute checksums and hashes, generate passwords and encrypt text locally.

Encoding and decoding

Convert text between Base64, hex, binary, ASCII, URL encoding and other representations.

Color tools

Convert, pick, invert and build palettes from colours.

Image, PDF and media tools

Resize, crop, convert and edit images and PDFs, and work with audio, video and YouTube links.

Network and IP tools

Look up DNS records and convert IPv4 and IPv6 addresses between formats.

HTML, CSS and code tools

Generators, formatters and minifiers for HTML, CSS, JavaScript, SQL and other code.

Calculators and unit converters

Finance, tax, cloud-cost, unit, date and number-base calculators.

Text tools

Clean, count, sort, compare and restyle text.

Random generators and fun tools

Random pickers and name, idea and data generators for games, writing and test data.

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