Dev Toolbox: JSON Base64 Hash

Dev Toolbox puts 13 small developer tools into one app. Paste, tap, copy. The tools work on your phone or tablet, without an account and without a connection.

FORMATTERS
• JSON Formatter – pretty-print or minify JSON, with a clear message when the input is not valid
• CSS Editor – tidy CSS rules and count rules, selectors and declarations
• HTML Editor – re-indent HTML by nesting and count elements and tags
• JS Editor – strip comments and blank lines from JavaScript and count lines and functions

ENCODERS AND CONVERTERS
• Base64 – encode and decode text
• JWT Decoder – read the header and payload of a token (the signature is not verified)
• Base Converter – binary, octal, decimal and hex
• Binary Text – text to binary and back
• HTML Entities – escape and unescape HTML

GENERATORS
• Hash Generator – MD5, SHA-1 and SHA-256 of any text
• Password Generator – 6 to 48 characters; choose letters, digits and symbols
• UUID Generator – up to 20 random version 4 UUIDs at once

TESTERS
• Regex Tester – try a pattern against your text and see every match

MADE FOR QUICK CHECKS
• Every tool has a sample, so one tap shows what it does
• Your last input stays on the device and is there when you come back
• Light and dark theme, phones and tablets
• 20 languages

YOUR INPUT STAYS ON YOUR DEVICE
The tools do their work on the device. What you paste is not uploaded to us. Dev Toolbox shows ads from Google AdMob, which may use device identifiers; the privacy policy has the details. Ads can be removed with an in-app purchase.

WHAT IT IS NOT
These are quick helpers, not a full code editor or IDE. The formatters handle the common cases and say so when they cannot handle an input.

Recent changes:
First release: 13 offline developer tools in one app. JSON, CSS, HTML and JS formatters, Base64, JWT decoder, regex tester, hash, password and UUID generators and more. Light and dark theme, phones and tablets, 20 languages.