OnliKit
All tools
19 tools across 4 categories.
data
Data / Formatter
JSON FormatterBeautify, validate, query, and repair JSON in the browserJSON ParserParse, format, validate, and inspect JSON in a clean workspaceJSON ↔ YAML / TOMLConvert between JSON, YAML, and TOML in one workspaceDiff CheckerCompare two text blocks with inline red and green highlightsJSON Diff CheckerCompare two JSON documents as formatted text or a collapsible diff treeMerge JSON FilesDeep-merge objects or combine JSON files into one array in your browser
image
Image tools
Compress ImageShrink JPG, PNG, and WebP without leaving your browserImage ConverterConvert between JPG, PNG, and WebP onlineResize ImageResize by pixels, percent, or social presetsHEIC ConverterConvert iPhone HEIC photos to JPG or PNGWatermark ImageAdd text or logo watermarks in the browserRemove EXIF MetadataRemove GPS, camera tags, and other metadata from photosBlur & RedactBlur or pixelate sensitive regionsFavicon GeneratorMake multi-size favicons from one image
dev
Developer tools
Timestamp ConverterConvert epoch, ISO dates, and timezones side by sideCron ExplainerTurn crontab expressions into plain English and next run timesJWT Encoder / DecoderDecode, encode, and verify JWTs with an optional secret or keyRegex Tester & ExplainerTest, build, and explain regular expressions in plain English