Free Online Developer Tools
Fast, private, and free. All tools run entirely in your browser — no data is ever sent to a server. No sign-up required.
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JSON Formatter & Validator
Format, validate, and beautify your JSON data with syntax highlighting.
FormattersB64
Base64 Encode/Decode
Encode text to Base64 or decode Base64 strings instantly.
Encoders%20
URL Encode/Decode
Encode or decode URL components and query parameters.
Encoders⏱
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Converters🎨
Color Converter
Convert colors between HEX, RGB, and HSL formats with live preview.
ConvertersAa
Word & Character Counter
Count words, characters, sentences, and paragraphs in your text.
TextMD
Markdown Preview
Write Markdown and see a live rendered preview side by side.
Formatters.*
Regex Tester
Test and debug regular expressions with real-time matching.
Text#
Hash Generator
Generate MD5, SHA-1, and SHA-256 hashes from any text.
GeneratorsID
UUID Generator
Generate random UUIDs (v4) with bulk generation support.
Generators