Developer Toolbox

All tools

Browse by category, or use the search above to quickly open a tool.

Developer toolbox

Free online developer tools for everyday work

Dev Fun brings together focused browser-based utilities for formatting, encoding, testing, generating, comparing, and converting developer data. Choose a category or open a tool directly; most processing stays on your device.

Encoders / Decoders

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Base64 ImageConvert images to and from Data URLsBase64 TextConvert UTF-8, Base64, and Base64URLCertificate ParserInspect PEM, DER, PFX, and certificate chainsGzipCompress and decompress files or Base64 dataHTML EntitiesEncode and decode HTML textJWTDecode, sign, and verify JSON Web TokensQR CodeGenerate or scan with upload, paste, or cameraURL Encoder / DecoderEncode or decode URL components and full URIs

Testers

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JSONPath TesterRun path expressions against JSONRegular ExpressionMatch, capture, and replace textXML ValidatorValidate XML documents

Formatters

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JSON FormatterFormat, minify, and validate JSONSQL FormatterFormat and minify common SQL dialectsXML FormatterFormat, minify, and validate XMLProxy FormatterNormalize proxy schemes and address formats

Generators

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Hash & ChecksumCalculate digests for text or filesLorem IpsumGenerate placeholder words, sentences, or paragraphsPassword GeneratorGenerate secure random passwordsUUID GeneratorGenerate UUID v1, v4, and v7htpasswdGenerate bcrypt or SHA-1 entries

Text

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Escape / UnescapeProcess JSON, JavaScript, HTML, and URLsList CompareFind intersections and items unique to either sideMarkdown PreviewSafely edit and preview MarkdownHTML PreviewPreview HTML in a restricted sandboxText CompareCompare differences by character, word, or lineText UtilitiesStatistics, case conversion, and line processing

Converters

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Cron ParserDetect syntax and predict run timesDate ParserConvert time zones, timestamps, and relative timesJSON to TableView as a table and export CSVJSON to YAML/TOMLConvert between common configuration formatsRadix ConverterCommon bases, RFC 4648, and custom alphabets

Image processing

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ID Photo MakerBackground colors, millimeter crops, and print layouts

Network Transfer

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WebRTC DiagnosticsCheck browser WebRTC, ICE candidates, STUN, and TURNPeer-to-Peer TransferSend files, folders, and text straight between browsers