Free Online Tools
41 Free Browser-Based Tools
No sign-up, no installation, no data sent to servers. Every tool runs entirely in your browser.
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Developer Tools
16
Token CounterEstimate GPT-4/Claude API tokens and cost before you send a request
JSON FormatterFormat, minify and validate JSON — syntax errors highlighted instantly
Base64 EncoderEncode and decode Base64 strings with full Unicode support
UUID GeneratorBulk-generate UUID v4 identifiers — copy all or download as .txt
JSON to CSVConvert JSON arrays to CSV spreadsheets in one click
Timestamp ConverterConvert Unix timestamps to readable dates and back instantly
HTML FormatterIndent and beautify HTML markup with syntax highlighting
HTML EncoderEncode and decode HTML entities — prevent XSS, display code safely
URL EncoderEncode and decode URLs and query strings with RFC 3986 compliance
JWT DecoderDecode JSON Web Tokens and inspect header, payload and signature
Regex TesterTest regular expressions live with match highlighting and group capture
Color ConverterConvert between HEX, RGB, HSL and CMYK colour formats
Base ConverterConvert numbers between binary, octal, decimal and hexadecimal
CSS MinifierMinify CSS by removing whitespace, comments and redundant rules
Char MapBrowse and copy special characters, symbols and Unicode glyphs
Binary / TextConvert text to binary digits and decode binary back to text
JSON FormatterFormat, minify and validate JSON — syntax errors highlighted instantly
Base64 EncoderEncode and decode Base64 strings with full Unicode support
UUID GeneratorBulk-generate UUID v4 identifiers — copy all or download as .txt
JSON to CSVConvert JSON arrays to CSV spreadsheets in one click
Timestamp ConverterConvert Unix timestamps to readable dates and back instantly
HTML FormatterIndent and beautify HTML markup with syntax highlighting
HTML EncoderEncode and decode HTML entities — prevent XSS, display code safely
URL EncoderEncode and decode URLs and query strings with RFC 3986 compliance
JWT DecoderDecode JSON Web Tokens and inspect header, payload and signature
Regex TesterTest regular expressions live with match highlighting and group capture
Color ConverterConvert between HEX, RGB, HSL and CMYK colour formats
Base ConverterConvert numbers between binary, octal, decimal and hexadecimal
CSS MinifierMinify CSS by removing whitespace, comments and redundant rules
Char MapBrowse and copy special characters, symbols and Unicode glyphs
Binary / TextConvert text to binary digits and decode binary back to text
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Text Tools
13
Word CounterCount words, characters, sentences, paragraphs and reading time instantly
Case ConverterConvert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case and more
Readability ScoreAnalyse text readability with Flesch-Kincaid and Gunning Fog index scores
AI Prompt GeneratorBuild high-quality prompts for ChatGPT, Claude, Midjourney and more
Markdown PreviewWrite Markdown and see the rendered HTML preview side by side
Lorem Ipsum GeneratorGenerate Latin placeholder text in words, sentences or paragraphs
Text Diff CheckerCompare two texts and highlight additions, deletions and changes
Find & ReplaceFind and replace text with plain text or regex support
Slug GeneratorConvert any title to an SEO-friendly URL slug instantly
Text ReverserReverse words, characters or lines in any text
Line SorterSort lines alphabetically, numerically or randomly — deduplicate too
Duplicate RemoverRemove duplicate lines from any text while preserving order
Word FrequencyCount word occurrences in any text and sort by frequency
Case ConverterConvert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case and more
Readability ScoreAnalyse text readability with Flesch-Kincaid and Gunning Fog index scores
AI Prompt GeneratorBuild high-quality prompts for ChatGPT, Claude, Midjourney and more
Markdown PreviewWrite Markdown and see the rendered HTML preview side by side
Lorem Ipsum GeneratorGenerate Latin placeholder text in words, sentences or paragraphs
Text Diff CheckerCompare two texts and highlight additions, deletions and changes
Find & ReplaceFind and replace text with plain text or regex support
Slug GeneratorConvert any title to an SEO-friendly URL slug instantly
Text ReverserReverse words, characters or lines in any text
Line SorterSort lines alphabetically, numerically or randomly — deduplicate too
Duplicate RemoverRemove duplicate lines from any text while preserving order
Word FrequencyCount word occurrences in any text and sort by frequency
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Utility Tools
5
QR Code GeneratorConvert any URL or text to a scannable QR code image
Morse Code TranslatorConvert text to Morse code dots and dashes and decode back
Unit ConverterConvert length, weight, temperature, volume and more between units
Age CalculatorCalculate exact age in years, months and days with birthday countdown
Roman NumeralsConvert between Arabic numbers and Roman numerals instantly
Morse Code TranslatorConvert text to Morse code dots and dashes and decode back
Unit ConverterConvert length, weight, temperature, volume and more between units
Age CalculatorCalculate exact age in years, months and days with birthday countdown
Roman NumeralsConvert between Arabic numbers and Roman numerals instantly
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Security Tools
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Math & Numbers
2
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Media Tools
2