Web Tools Collection
A collection of useful online tools for developers and everyday tasks
Text Tools
10Unicode EncodingUnicode encoder and decoder onlineUTF-8 ConverterUTF-8 encoder and decoder onlineText DifferenceCompare text and files line by lineAI Text DetectorScreen text for AI-generated writing signalsClaude Watermark RemoverClean invisible text markers locallyVigenere Cipher ConverterEncrypt and decrypt Vigenere cipher text onlineEncoding ConverterConvert text and CSV encoding, including Shift_JIS, GBK, Big5, EUC-KR, and UTF-8BASE64Decode and encode Base64 onlineMD5 GeneratorGenerate MD5 hashes onlineURL Encoding/DecodingEncode and decode text for use in URLs
Data Tools
4JSON/JSON5 FormatterFormat, validate, beautify, and minify JSON, JSON5, and JSONC with commentsURL Parameters ParserExtract and analyze parameters from URLsJSON ↔ TOON ConverterConvert JSON to TOON format to save LLM tokensXML ValidatorValidate, format, and minify XML online. Free XML syntax checker with instant error detection.
Web Tools
9Password GeneratorGenerate strong random passwords instantlyUnix TimestampConvert between Unix timestamps and human-readable datesPercentage ChangeCalculate percentage increase or decreaseStock Limit Price CalculatorCalculate stock limit-up and limit-down pricesStock Recovery CalculatorCalculate stock loss recovery and limit-up movesArcsin CalculatorCalculate arcsin angles in degrees and radiansUUID ValidatorValidate and check UUID format, version, and structure. Free online UUID validator tool.Random Number GeneratorGenerate random numbers with configurable precision, range, and quantity. Uses cryptographically secure randomness.Pantone to RGB ConverterConvert Pantone colors to RGB, HEX, and HSL. Includes color preview, reference table, and HEX to Pantone matching.
QR Code Tools
3Image Tools
6Color PickerPick colors from images and screenAI Image DetectorFree AI image detector onlineLow Quality Image MakerMake images low quality onlineImage to Line DrawingTurn photos into line drawingsColoring Page MakerMake coloring pages from photosMatcha Filter RemoveMatcha Filter Remove: reduce green tint from photos