$ cat README.md
Free Online Developer Tools. Zero data leaves your machine.
JSON formatter, image resizer, Base64 encoder, UUID generator, and 30+ free browser-based tools. Convert, decode, and transform files entirely client-side. No server, no upload — 100% client-side.
all processing runs in your browser
$ ls ./tools
Image Tools
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imgheic-to-jpgConvert Apple HEIC photos to JPG
imgbase64-to-imageConvert Base64 to images
imgimage-to-base64Convert images to Base64
imgimage-resizerResize images to exact dimensions
imgwebp-converterConvert images to WebP
imgpng-to-jpgConvert PNG to JPG
imgimage-compressorCompress images
imgbackground-removerRemove image backgrounds
Developer Tools
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devcsv-viewerView CSV files as tables
devjson-formatterFormat and validate JSON
devjson-minifierMinify and compress JSON
devjsonl-validatorValidate JSONL line by line
devwcag-contrast-checkerCheck WCAG contrast compliance
devcolor-pickerPick and convert colors
devcron-expression-generatorBuild and validate cron expressions
Converters
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convyaml-to-jsonConvert YAML to JSON format
convcsv-to-jsonConvert CSV to JSON
convjson-to-csvConvert JSON arrays to CSV
convxml-to-jsonConvert XML to JSON
convexcel-to-csvConvert Excel to CSV
convbase64-encoderEncode/decode Base64
convurl-encoderEncode/decode URL strings
convjson-to-yamlConvert JSON to YAML format
convtimestamp-converterConvert Unix timestamps to dates
convhex-to-rgbConvert HEX to RGB colors
convnumber-base-changerConvert between number bases
convcss-units-converterConvert px/rem/em/pt
convnumbers-to-wordsConvert numbers to English words
convroman-numeral-converterConvert numbers ↔ Roman numerals
convmorse-code-translatorTranslate text ↔ Morse code
convbinary-text-converterConvert binary ↔ text
convhex-string-converterConvert hex ↔ text strings
convascii-text-converterConvert ASCII codes ↔ text
Web Tools
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webhtml-minifierMinify HTML code
webmarkdown-to-htmlConvert Markdown to HTML
webhtml-to-markdownConvert HTML to Markdown
webregex-testerTest regex patterns
webquery-params-to-jsonConvert query strings to JSON
websql-minifierMinify SQL queries
webcss-inlinerInline CSS for emails
webenv-to-netlifyConvert .env to Netlify TOML
webhar-viewerView HAR network logs
websvg-viewerPreview SVG code
webspeed-testTest download/upload speed
Security
PDF Tools
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pdfpdf-mergerMerge PDF files
pdfpdf-splitterSplit PDF into pages
pdfrotate-pdfRotate PDF pages
pdfpdf-to-imagesConvert PDF pages to images
pdfimages-to-pdfConvert images to PDF
pdfpdf-watermarkAdd text watermark to PDF
pdfencrypt-pdfPassword-protect PDF files
pdfdecrypt-pdfRemove PDF password protection
Text Tools
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textword-counterCount words and characters
textcharacter-counterCount characters and letter frequency
textsentence-counterCount sentences and analyze readability
texttext-case-converterConvert text between cases
textremove-whitespaceRemove extra spaces and blank lines
textbackwards-textReverse and flip text
textunicode-text-generatorGenerate fancy Unicode text styles
textglitch-text-generatorGenerate glitchy Zalgo text