Developer Tools

Format JSON, decode JWT, encode Base64 & more.

8 free tools · no signup · runs in your browser

JSON Formatter

Format, beautify, minify and validate JSON online with instant error detection and syntax highlighting.

JSON Validator

Validate JSON online and find syntax errors instantly, with the exact line and column of every problem.

Base64 Encoder & Decoder

Encode text and files to Base64 or decode Base64 back to text and files — instantly, in your browser.

JWT Decoder

Decode a JSON Web Token (JWT) to inspect its header, payload and claims — entirely in your browser. Signatures are never sent anywhere.

URL Encoder & Decoder

Encode text for safe use in URLs or decode percent-encoded URLs back to readable text — instantly.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and back, with timezone support and a live current timestamp.

SHA-256 Hash Generator

Generate a SHA-256 hash from any text in real time, directly in your browser. Copy the result with one click.

MD5 Hash Generator

Generate an MD5 hash from any text in real time, directly in your browser. Copy the 32-character result with one click.

What are developer tools?

These developer tools handle the everyday encoding, formatting and decoding tasks that come up constantly in web and software work: format and validate JSON, decode JWTs, encode and decode Base64 and URLs, convert timestamps, and generate hashes. They save you from hunting for a snippet or spinning up a script for a one-off job.

Privacy matters for developers, so every tool runs entirely in your browser — tokens, payloads and secrets are processed locally and never uploaded. There is no sign-up and nothing to install: paste your data, get the result instantly, and keep working.

Frequently asked questions

Yes. Every developer tool is free with no sign-up and no usage limits.

Yes. The JWT decoder runs entirely in your browser, so your token is never sent to a server. Still, never share tokens you do not control.

Yes. The JSON formatter beautifies and the validator checks your JSON and reports errors, all in the browser.

No. All processing happens locally in your browser for privacy.