44 free browser tools that get the job done.
Developer utilities, PDF and image tools, text converters and everyday helpers. Everything runs in your browser.
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Developer Tools 19 tools
- Base64 Encoder DecoderEncode and decode Base64
- Cron Expression BuilderBuild a cron schedule visually
- CSV to JSON ConverterConvert CSV to JSON and back
- Diff CheckerSee what changed between two texts
- Hash GeneratorMD5, SHA-1 and SHA-256 hashes
- JSON FormatterFormat and validate JSON
- JWT DecoderInspect a JWT's header and claims
- LLM API Cost CalculatorCompare LLM API costs by model
- Markdown EditorWrite Markdown with a live preview
- PX to REM ConverterConvert px, rem and em
- Regex TesterTest regular expressions live
- Responsive Design TesterPreview a site at different screen sizes
- Slug GeneratorTurn a title into a clean URL slug
- SQL FormatterFormat or minify SQL queries
- Subnet CalculatorSubnet mask, range and host count
- Unix Timestamp ConverterUnix timestamps to dates and back
- URL Encoder DecoderEncode and decode URLs
- UTM BuilderBuild campaign URLs with UTM tags
- UUID GeneratorGenerate and decode UUIDs
PDF, Images & Color 8 tools
- Color Code ConverterHEX, RGB, HSL and CMYK
- Color Contrast CheckerCheck WCAG color contrast
- Favicon GeneratorEvery favicon size from one image
- Image CompressorShrink image file sizes
- Image Format ConverterConvert JPEG, PNG and WebP
- Image to PDFTurn images into one PDF
- PDF MergeCombine PDFs into one file
- PDF SplitPull pages out of a PDF
Text & Numbers 7 tools
- Case ConverterTitle, sentence, camel and snake case
- Lorem Ipsum GeneratorPlaceholder text in several styles
- Morse Code TranslatorText to Morse code and back
- Number to Words ConverterSpell out any number in words
- Number ToolsPercentages, random numbers and more
- Text to Binary ConverterText to binary, hex and ASCII
- Text ToolsWord count, find and replace, sorting
Everyday Utilities 10 tools
- Aspect Ratio CalculatorScale dimensions to any aspect ratio
- Internet Speed TestTest your internet speed
- Invoice GeneratorMake an invoice and download a PDF
- Password GeneratorStrong passwords and passphrases
- Pomodoro TimerA focus timer with breaks
- Privacy Policy GeneratorGenerate a privacy policy
- Random PickerPick a random name or item
- Screen PPI CalculatorPixels per inch for any screen
- Terms of Service GeneratorGenerate terms of service
- Video Bitrate & File Size CalculatorVideo file size from bitrate