Developer Tools
Encode, hash, diff, and build for developers.
Base64 Encoder / DecoderEncode and decode Base64, with URL-safe mode.URL Query String BuilderBuild and parse URL query strings.Password Hash GeneratorGenerate and compare password hashes.Code DiffDiff two code snippets with word-level detail.UUID GeneratorGenerate UUID v4 and v7 in batches, with prefixes.Base64 Data URI GeneratorTurn text, CSS, JS, JSON, or SVG into a data:<mime>;base64, URI — UTF-8 safe.Cron Next Run CalculatorSee exactly when your 5-field cron expression fires next — to the minute.JSON Compare (Diff)Deep-diff two JSON documents: added, removed, and changed paths with old → new values.JSON to Code GeneratorInfer a typed data model from a JSON sample — Python, Rust, C#, Java, Go, or GraphQL.JWT Decoder & Expiry CheckerDecode a JWT's header and payload and check its exp claim against the current time.SQL Case ConverterRe-case SQL keywords to UPPERCASE, lowercase, or Title Case — strings untouched.SQL FormatterReformats messy SQL: uppercased keywords, one clause per line, indented subqueries.Unix Timestamp ConverterTurn a Unix timestamp into human-readable local, ISO 8601, and UTC dates in one step.URL ValidatorCheck a URL's scheme, host, port, query, fragment, and length.Free Base64 Data URI GeneratorTurn text, CSS, or SVG into a base64 data URI. No account, no limits, no watermark.Base64 Data URI Generator OnlineTurn text, CSS, or SVG into a base64 data URI. Runs in any browser, no install.Free Cron Next Run CalculatorSee when your 5-field cron expression fires next. No account, no limits, no watermark.Cron Next Run Calculator OnlineSee when your 5-field cron expression fires next. Runs in any browser, no install.Free JWT Decoder & Expiry CheckerDecode a JWT and check its exp claim and alg. No account, no limits, no watermark.JWT Decoder & Expiry Checker OnlineDecode a JWT and check its exp claim and alg. Runs in any browser, no install.Free SQL FormatterFormat SQL: uppercase keywords, one clause per line. No account, no limits, no watermark.SQL Formatter OnlineFormat SQL: uppercase keywords, one clause per line. Runs in any browser, no install.Free Unix Timestamp ConverterConvert a Unix timestamp to local, ISO 8601, and UTC. No account, no limits, no watermark.Unix Timestamp Converter OnlineConvert a Unix timestamp to local, ISO 8601, and UTC. Runs in any browser, no install.Free UUID GeneratorGenerate UUID v4 and v7 in batches, with prefixes. No account, no limits, no watermark.UUID Generator OnlineGenerate UUID v4 and v7 in batches, with prefixes. Runs in any browser, no install.JSON FormatterFormat or validate JSON with 1, 2, or 4-space or tab indentation.JSON ValidatorPaste JSON to get a five-check report: validity, shape, duplicates, depth, size.MD5 & SHA-256 Hash GeneratorCompute MD5 and SHA-256 digests of any text in your browser.Password GeneratorGenerate a reproducible password from a length, character set, and seed.Random Number GeneratorGenerate a reproducible set of random integers between any two bounds.Regex GeneratorGenerate regular expressions for email, phone, URL, dates, IPv4, ZIP, semver.URL Encoder & DecoderEncode or decode text as percent-encoding, URL-unsafe form, or Base64.