Developer Toolbelt

Practical frontend-first utilities for formatting, decoding, hashing, previewing, and validating developer data.

All Tools
15 available

JSON Formatter

Format, validate, and minify JSON in your browser.

Regex Tester

Test regular expressions with live match highlighting.

Base64 Encode/Decode

Encode and decode Base64 strings in one click.

Unix Timestamp Converter

Convert epoch timestamps to readable dates and back.

URL Encode/Decode

Encode URLs safely or decode percent-encoded text.

Hash Generator

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from text.

UUID Generator

Generate random UUID v4 identifiers instantly.

Color Converter

Convert colors between HEX, RGB, HSL and CMYK.

JWT Decoder

Decode and inspect JWT token header and payload.

Markdown Preview

Write and preview Markdown with live rendering.

Cron Expression Generator

Build cron expressions with quick presets and readable summaries.

QR Code Generator

Generate downloadable QR codes from text or URLs instantly.

YAML JSON Converter

Convert YAML to JSON or JSON to YAML with validation.

Diff Checker

Compare two texts line by line and inspect additions or removals.

HTML Entity Encoder

Encode or decode HTML entities for safe markup output.