Developer Tools

Free developer tools that run locally: Base64, URL encode/decode, JSON formatter, JWT decode, hash generator, and timestamp converter.
Client-side • Private • Free

Pick a tool

SEO split pages
Each tool has its own URL for SEO and sharing. Everything runs 100% locally in your browser.

Base64

/dev/base64/
Encode or decode Base64 (Unicode-safe).
Open Base64

URL Encode

/dev/url-encode/
Encode/decode URL components safely.
Open URL Tool

JSON Formatter

/dev/json-formatter/
Prettify or minify JSON; shows errors.
Open JSON Tool

JWT Decode

/dev/jwt-decode/
Decode header/payload locally (no verification).
Open JWT Tool

Hash Generator

/dev/hash/
Generate SHA-256/SHA-1 (WebCrypto) or MD5 (JS).
Open Hash Tool

Timestamp

/dev/timestamp/
Unix ↔ local time conversion.
Open Time Tool
All processing is done locally in your browser.
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