A collection of practical, browser-based developer tools

No sign-up, no tracking — just results.

JSON Format / Compress

Format, compress, and validate JSON online. Pretty-print with configurable indentation, minify to single line, or parse JSON5. 100% client-side.

Base64 Encode/Decode

Encode and decode Base64 strings online. Free Base64 encoder/decoder with Basic Authentication header support. 100% client-side.

JWT

Encode, decode, and verify JSON Web Tokens (JWT). Supports HS256, RS256, ES256 and more. 100% client-side.

URL Encoder/Decoder

Encode and decode URL strings with Component, Whole URL, and Form modes. Free online URL encoder/decoder, 100% client-side.

UUID Generator

Generate v1/v3/v4/v5/v7 UUIDs in your browser. Free, fully local, no tracking.

Text Diff

Compare two texts or code snippets with line and word-level precision. Side-by-side or inline view, 100% client-side.

Text Hashing

Generate MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA3, and RIPEMD-160 hashes. Free online hash generator, 100% browser-based.

Password Generator

Generate cryptographically secure, random passwords instantly. Free online password generator with customizable length and character options.

Text Encrypt/Decrypt

Encrypt and decrypt text using AES, DES, Triple DES, Rabbit, RC4, and RC4Drop. Free online cipher tool, 100% browser-based.

Cron

Build and decode Cron expressions for Standard, Spring, and Quartz schedulers. See human-readable explanations and the next 5 execution times.

Unix Timestamp

Convert between Unix timestamps and human-readable dates. Supports seconds and milliseconds, shows Local and UTC side-by-side, with a live clock. 100% client-side.

Markdown Editor

Write and preview Markdown with GitHub Flavored Markdown support. Free online Markdown editor with live preview, 100% client-side.

DB Viewer

Open SQLite databases in your browser, browse schema, run read-only SQL with autocomplete, paginate large result sets, and export to CSV or JSON. 100% client-side.

File Checksum

Calculate MD5, SHA-1, SHA-256, and SHA-512 checksums for any file. Supports unlimited file size, 100% client-side processing.

Storage Unit Conversion

Convert between bytes, KB, MB, GB, TB, PB and more. Free online storage unit converter for developers.

ASCII Table

Complete ASCII character table with hex, octal, HTML, and decimal codes. Free online ASCII reference for developers.

Html Code

Encode and decode HTML special characters and entities. Free online HTML code converter for web developers.