Developer Tools

Free browser-native utilities for formatting, validating, encoding and debugging common developer data. Most tools run locally in your browser, so pasted content stays on your device.

JSON Formatter & Validator

Available

Format, validate, minify and sort JSON locally in your browser.

XML Formatter & Validator

Available

Format, validate and minify XML locally in your browser.

Hash Generator

Available

Generate SHA-256, SHA-1 and MD5 checksums from text or local files.

UUID Generator

Available

Create UUID v4 values and copy them in common developer formats.

Unix Timestamp Converter

Available

Convert epoch timestamps to readable UTC and local dates.

Regex Tester

Available

Test JavaScript regular expressions against sample text with live matches.

URL Encoder & Decoder

Available

Encode and decode URLs, query strings and URL components.

HTML Entity Encoder & Decoder

Available

Encode HTML-sensitive characters and decode named, decimal, and hexadecimal HTML entities locally in your browser.

Markdown to HTML Converter

Available

Convert Markdown syntax into HTML locally in your browser with a live preview.

JWT Decoder

Available

Decode JSON Web Token headers and payloads locally in your browser, including exp, nbf and iat timing claims.

Text Diff Checker

Available

Compare two text blocks and inspect line-level differences.

QR Code Generator

Available

Create PNG and SVG QR codes for URLs, text, Wi-Fi and contact details.

Browser-first developer utilities

Convertr developer tools focus on quick, repeatable tasks: clean up structured data, generate IDs and checksums, debug regular expressions, convert timestamps, compare text and prepare strings for URLs. Tools are linked here from one stable hub so they are easier to find and easier for search engines to understand.

Planned additions

  • Base64 encoder and decoder
  • YAML formatter and validator
  • Color converter
  • SVG optimizer