Free tools
Browser-only utilities, free forever.
Everything below runs in your browser. No signup, no tracking, no server uploads. Bookmark them, share them, use them daily.
- /01
JSON Formatter & Validator
Paste JSON, get formatted, validated, and minified output instantly. Runs entirely in your browser.
- /02
Encoder & Decoder
Base64, URL encode/decode, UUID generation, and Unix ↔ ISO timestamp conversion, all in one tool.
- /03
Password Generator
Generate cryptographically strong passwords with configurable length and character classes.
- /04
Invoice Calculator
Calculate totals across multiple line items with quantity, price, tax, and discount.
- /05
Image Format Converter
Convert images between PNG, JPEG, and WebP with quality control, entirely in your browser.
- /06
Markdown Preview
Write Markdown and see the rendered HTML side-by-side. Supports GitHub-flavored syntax.
- /07
Color Picker & Converter
Convert between HEX, RGB, and HSL and check WCAG contrast ratios.
- /08
Regex Tester
Test JavaScript regular expressions against sample text, with named groups and flags.
- /09
Lorem Ipsum Generator
Generate placeholder text by paragraph, sentence, or word count.
- /10
JWT Decoder
Decode JWT headers and payloads locally, your token is never sent anywhere.
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