Developer Tools
A set of everyday developer utilities that run entirely in your browser, so even sensitive data never leaves your device. Format and shrink data with the JSON formatter and JSON minifier, or move data safely between systems using Base64 encode and decode, URL encode and decode, and HTML encode and decode. Generate fingerprints and identifiers with the SHA-256 and SHA-512 hash generators, and inspect tokens with the JWT decoder. Each tool is free, needs no signup, and works instantly as you type.
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JSON FormatterFormat, beautify and validate JSON instantly.Unix Timestamp ConverterConvert Unix time to a date and back.API Rate Limit CalculatorConvert API limits into per-second and per-user numbers.CSS Grid GeneratorGenerate responsive CSS grid code.Current Unix TimestampSee the live epoch time right now.Downtime CalculatorConvert uptime percentage into downtime allowance.Error Rate CalculatorCalculate request error rate and success rate.Flexbox GeneratorGenerate flexbox layout CSS.Mailto Link GeneratorGenerate mailto links with subject and body.Requests Per Second CalculatorCalculate RPS and response bandwidth.Uptime CalculatorCalculate uptime from downtime minutes.UTM BuilderBuild campaign URLs with source, medium and campaign tags.WhatsApp Link GeneratorGenerate wa.me links with a message.Cache Hit Rate CalculatorCalculate cache hit rate and miss rate.Calendar Link GeneratorGenerate Google Calendar event links.HTML Email Button GeneratorGenerate table-based email button HTML.SMS Link GeneratorGenerate SMS links with optional message.Tel Link GeneratorGenerate click-to-call telephone links.DMARC Record GeneratorGenerate a DMARC TXT record.JSON to TypeScriptTurn a JSON sample into TS interfaces.JSON to YAML ConverterConvert JSON objects into readable YAML.SPF Record GeneratorGenerate an SPF TXT record.YAML to JSON ConverterConvert YAML files and snippets into formatted JSON.Backup Storage CalculatorEstimate backup storage needs.Batch Processing Time CalculatorEstimate job runtime from throughput.CSV Column CounterCount header columns and row widths.Hreflang Tag GeneratorGenerate a hreflang link tag.Meta Tag GeneratorCreate basic title, description, canonical and robots tags.Permissions Policy GeneratorGenerate a Permissions-Policy header.Queue Drain Time CalculatorEstimate how long a queue takes to clear.Schema Markup GeneratorGenerate simple JSON-LD schema snippets.SERP Snippet PreviewPreview a title tag and meta description.Bandwidth Cost CalculatorEstimate bandwidth overage cost.Cookie ParserParse a Cookie request header.CSV Delimiter DetectorGuess comma, semicolon, tab or pipe delimiter.Database Size EstimatorEstimate database storage from rows.Markdown to HTMLConvert simple Markdown into HTML.Open Graph GeneratorGenerate Open Graph and Twitter Card meta tags.Sitemap URL Count CheckerCount URLs and duplicates in a sitemap list.Skip Link GeneratorGenerate a skip link snippet.Storage Growth CalculatorForecast storage growth over time.X-Frame-Options GeneratorGenerate frame protection headers.Text to Binary ConverterConvert text into binary code.Morse Code TranslatorTranslate text into Morse code.Base64 EncodeEncode text to Base64 instantly.SHA-256 Hash GeneratorGenerate a SHA-256 hash of any text.CSS Filter GeneratorBuild CSS filter effects visually.Line Height CalculatorCalculate readable CSS line height.