Developer Tools

36+ online tools — free, clean, no sign-in

Encoding

3

URL Encode/DecodePercent-encode and decode URLs Base64 Encode/DecodeBase64 encode/decode with UTF-8 support Hash CalculatorSHA-1 / SHA-256 / SHA-384 / SHA-512 digests

Text

4

Regex ValidatorValidate and highlight regex matches live Markdown RendererConvert Markdown to HTML with live preview Code Minify/BeautifyMinify and beautify JS / CSS / HTML Text DiffCompare two text snippets line by line

Data

6

JSON ToolsFormat, minify, validate and locate JSON errors Data ConverterConvert between JSON / YAML / XML / CSV Random GeneratorGenerate secure random numbers and sequences UUID GeneratorBatch generate UUID v4 Password GeneratorGenerate strong passwords with custom rules Encryption ToolsAES / DES / RSA encryption and decryption

Network

3

WebSocket TesterDebug WebSocket connections online Ping ToolMeasure response latency of a target URL API TesterSend HTTP requests and inspect responses

Time

5

Timestamp ConverterConvert between Unix timestamp and datetime Date CalculatorAdd/subtract dates and compute intervals World ClockReal-time clocks across time zones Workday CountdownCountdown to off-work / weekend / holiday Time ConverterConvert between seconds / minutes / hours / days

Graphic

2

QR Code GeneratorGenerate custom-styled QR codes Image ConverterConvert between PNG / JPG / WebP formats

Fun

4

Fortune AnalyzerFun fortune analysis from your birthday Lottery SimulatorSimulate double-color / super lotto draws Random DecisionLet randomness decide among options Slacking Cost CalculatorCalculate the cost of slacking at work

Design

4

Color ConverterConvert between HEX / RGB / HSL CSS BeautifierFormat and minify CSS CSS Animation GeneratorVisually generate CSS animation code Fortune DrawDraw today's fortune stick

Symbols

4

Emoji FinderSearch and copy emoji Kaomoji FinderBrowse and copy kaomoji Special CharactersPunctuation / math / numbering symbols Daily SignDaily motivational sign for workers