Online Tools
A growing set of free developer and everyday tools — formatters, encoders, generators and converters. Everything runs locally in your browser; nothing is uploaded.
Developer
JSON Formatter
Beautify, minify and validate JSON in one click, with automatic error detection.
JSON ⇄ CSV ⇄ Excel Converter
Convert tabular data between JSON, CSV and Excel (.xlsx) — free, fast and entirely in your browser.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable date-time in real time.
UUID Generator
Batch-generate UUID v4 with one-click copy — great for testing and database keys.
Regex Tester
Test regular expressions live, highlight matches, with flags and capture groups.
Encoding
Text
Word Counter
Instantly count words, characters, sentences, paragraphs and reading time.
Case Converter
Switch between UPPERCASE, lowercase, Title Case, camelCase, snake_case and more in one click.
Chinese Converter (Traditional ⇄ Simplified)
Convert between Traditional (Taiwan) and Simplified Chinese — including vocabulary — in your browser. Free, no upload.