Developer Tools calculators
Base64, URL encoding, JSON, hashes, UUIDs, colors and number bases.
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ASCII TableLook up any ASCII character code in decimal, hex, octal and binaryBase64 Encode / DecodeConvert text to Base64 and back instantly, with full UTF-8 and URL-safe supportColor Converter (HEX to RGB)Convert any color between HEX, RGB, HSL, HSV and CMYK in one stepCron Expression GeneratorPick a schedule, get the cron expression and its next run timesHash GeneratorGenerate MD5, SHA-1, SHA-256 and SHA-512 hashes and verify checksumsHTML FormatterBeautify messy HTML with clean indentation, or minify it for productionImages to PDF ConverterCombine JPG, PNG and WebP images into one PDF without uploading themIP Subnet CalculatorFind network, broadcast, host range and mask for any IPv4 address and CIDRJSON Formatter & ValidatorBeautify, minify and validate JSON with the exact line and column of any errorJSON to TypeScriptPaste a JSON sample, get clean TypeScript interfaces instantlyNumber Base ConverterConvert between binary, octal, decimal, hex and any base from 2 to 36Password Strength CheckerSee how many bits of entropy your password has and how fast it could be crackedPDF MergerCombine PDFs and pick or reorder pages — files never leave your deviceQR Code GeneratorMake a free QR code for a link, Wi-Fi network, text, email or phoneRandom String GeneratorGenerate secure random strings, tokens and API keys with any character setRegex TesterTest JavaScript regular expressions live, with matches, groups and replaceUnix Timestamp ConverterConvert Unix epoch time to a readable date and any date back to epochURL Encode / DecodePercent-encode or decode URLs, query strings and form data correctlyUUID GeneratorCreate random v4 or time-ordered v7 UUIDs in bulk, and validate any UUIDXML Formatter & ValidatorPretty-print or minify XML and pinpoint well-formedness errors
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Aspect Ratio CalculatorFind any aspect ratio and resize width or height without distortionBandwidth & Data Usage CalculatorEstimate the bandwidth and monthly data transfer your site or stream needsBarcode GeneratorMake scannable UPC, EAN, Code 128 and Code 39 barcodes — download as SVG or PNGBcrypt Hash GeneratorCreate bcrypt password hashes with any cost factor, or check oneBitwise CalculatorAND, OR, XOR, NOT and shifts on 8- to 64-bit integers, shown in binarycamelCase / snake_case ConverterConvert variable names between camelCase, snake_case, kebab-case and moreChmod CalculatorConvert Linux file permissions between 755, rwxr-xr-x and checkboxesCIDR to IP RangeExpand a CIDR block to its first and last IP, or turn a range into CIDRsColor Contrast CheckerTest text and background colours against WCAG AA and AAA in secondsCron Expression ParserTranslate any crontab schedule into plain English and see its next runsCSS Border Radius GeneratorShape rounded corners and organic blobs, then copy clean CSSCSS Box Shadow GeneratorDesign soft, layered or inset shadows visually and copy the box-shadow CSSCSS Clamp CalculatorGenerate fluid clamp() font sizes that scale smoothly between breakpointsCSS Gradient GeneratorDesign linear, radial and conic gradients and copy clean CSSCSS Minifier & BeautifierCompress CSS for production or pretty-print it to read, and see the savingsCSV to JSON ConverterPaste CSV, get clean JSON — headers, quotes and types handledCubic Bezier Easing EditorShape CSS animation easing curves, preview the motion and copy cubic-bezier()Download Time CalculatorSee how long any file takes to download or upload at your internet speedFlexbox & Grid PlaygroundTry flexbox and CSS grid settings live, then copy the CSS, HTML or TailwindHex CalculatorAdd, subtract, multiply and divide hex numbers with decimal and binaryHex to Text ConverterDecode hexadecimal bytes to readable text — or encode text as hexHMAC GeneratorSign a message with a secret key using HMAC-SHA256, SHA-512, SHA-1 or MD5HTML Entity Encoder / DecoderEscape text to HTML entities or decode &, © and © back to textHTML Table GeneratorTurn CSV, spreadsheet cells or tab-separated data into clean HTML table codeHTML to Markdown ConverterTurn HTML into clean Markdown — headings, lists, links, tables and codeHTTP Status Code LookupLook up any HTTP status code: meaning, typical cause, caching and retry adviceImage to Base64 ConverterTurn an image into a Base64 data URI — or decode Base64 back into an imageIP Address ConverterConvert IPv4 addresses between dotted decimal, integer, hex and binaryJavaScript BeautifierFormat minified or messy JavaScript into clean, consistently indented codeJSON DiffCompare two JSON documents and see every added, removed and changed valueJSON to CSV ConverterTurn a JSON array into a spreadsheet-ready CSV with nested keys flattenedJSON to XML ConverterConvert JSON to well-formed XML and XML back to JSON, with attributesJSON to YAML ConverterConvert JSON into clean, correctly quoted YAML for configs and manifestsJWT DecoderDecode a JSON Web Token and check when it was issued and expiresJWT GeneratorCreate and sign HS256 or HS512 JSON Web Tokens for testingMarkdown Table GeneratorTurn CSV, TSV or spreadsheet cells into a clean Markdown tableMarkdown to HTML ConverterConvert Markdown to clean, semantic HTML you can paste anywherePDF SplitterSplit a PDF into ranges, single pages or equal parts — without uploading itPX to REM ConverterConvert CSS pixels to rem and back — single values or whole stylesheetsQR Code ScannerScan QR codes from an image, screenshot or camera — privately, in your browserRAID CalculatorUsable capacity, fault tolerance and IOPS for RAID 0, 1, 5, 6, 10, 50 and 60Regex GeneratorReady-made regex for email, phone, dates, IPs and more — explainedSocial Media Image Size GuideOfficial image sizes for posts, thumbnails, banners and favicons, with crop mathSQL INSERT GeneratorTurn CSV rows into ready-to-run SQL INSERT statements for your databaseString Escape / UnescapeEscape or unescape text for JSON, JavaScript, SQL, CSV, regex, shell and XMLSVG Path EditorPreview SVG path data, get its bounding box and length, and minify itText to Binary ConverterTranslate text to binary, hex, decimal or octal — and decode it backURL ParserBreak any URL into protocol, host, port, path, query parameters and fragmentURL Slug GeneratorTurn any title into a clean, SEO-friendly URL slugUser Agent ParserTurn a user-agent string into browser, version, OS, engine and device typeYAML to JSON ConverterConvert YAML to JSON and JSON to YAML — and validate as you goCode Screenshot GeneratorTurn a code snippet into a crisp, syntax-highlighted PNG to shareCRC32 Checksum CalculatorCompute CRC-32, CRC-32C, CRC-16, CRC-8 and Adler-32 for text or hex bytesHard Drive Actual Capacity CalculatorSee why a 1 TB drive shows 931 GB in Windows — and what you really getIEEE 754 Float ConverterSee the exact sign, exponent and mantissa bits of any float or doubleIPv6 Expand & CompressExpand, compress and inspect any IPv6 address and prefixMAC Address Generator & FormatterGenerate random MAC addresses and convert any MAC between formatsPPI CalculatorFind pixel density, dot pitch and screen size from resolutionRate Limit CalculatorConvert API quotas between per-second, minute, hour and day, and size workersSemver Range CheckerTest which versions satisfy an npm semver range, and compare versionsSQL FormatterBeautify messy SQL into clean, indented, readable queriesTwo's Complement CalculatorConvert signed integers to and from two’s complement binary and hexULID & NanoID GeneratorGenerate sortable ULIDs or compact NanoIDs, and decode ULID timestamps