DEVELOPER TOOLS

Online developer tools

Handle repetitive development and diagnostic tasks with specialized utilities that run inside the browser.

Code, conversion and diagnostics

Format code, inspect tokens, calculate hashes, test regular expressions and convert representations without installing another application.

Understandable security boundaries

Pages explain what they verify and what they do not. For example, the JWT viewer decodes content but does not validate signatures, while cryptographic generators use secure browser APIs.

27 TOOLS

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Developer toolsJavaScript FormatterFormat JavaScript with a consistent, readable style.Developer toolsJavaScript MinifierCompress JavaScript to reduce its size.Developer toolsCSS FormatterOrganize CSS rules to make them easier to maintain.Developer toolsCSS MinifierReduce CSS stylesheets locally.Developer toolsBase64 EncoderEncode or decode text locally and safely.Developer toolsJWT DecoderInspect header and payload without verifying the signature.Developer toolsUUID GeneratorCreate unique identifiers for your projects.Developer toolsQR Code GeneratorCreate QR codes for text, links or data with no sign-up.Developer toolsQR Code ReaderRead a QR code from an image without uploading it.Developer toolsURL Encoder and DecoderEscape or restore URL parameters and paths.Developer toolsHTML Entity EncoderEscape HTML or decode its entities.Developer toolsSHA Hash GeneratorCalculate SHA-1, SHA-256, SHA-384 and SHA-512.Developer toolsFile ChecksumVerify files with SHA-256, SHA-384 or SHA-512.Developer toolsUnix Timestamp ConverterConvert dates, seconds and milliseconds.Developer toolsRegex TesterTest patterns, flags, groups and indices.Developer toolsSQL FormatterFormat SQL queries and normalize keywords.Developer toolsCron Expression ExplainerTranslate a Cron expression into natural language.Developer toolsBinary, Hex and Decimal ConverterConvert numbers between bases 2, 8, 10 and 16.Developer toolsSecure Password GeneratorCreate random passwords with Web Crypto.Developer toolsGZip Compress and DecompressConvert text to GZip Base64 and back.Developer toolsX.509 Certificate ViewerInspect subject, issuer, validity and thumbprint.Developer toolsBarcode GeneratorCreate EAN-13, CODE128, UPC and CODE39 barcodes as PNG.Developer toolsWiFi QR Code GeneratorCreate a QR to join your WiFi without dictating the password.Developer toolsHEX, RGB and HSL Color ConverterConvert a color between HEX, RGB and HSL instantly.Developer toolsColor Contrast CheckerCalculate WCAG contrast between two HEX colors.Developer toolsSubnet and CIDR CalculatorGet IPv4 network, mask, broadcast and range.Developer toolsCSR DecoderRead the subject, public key and signature of a PEM CSR.