{ }Devtool
Base64 Encode / DecodeDelimiter Converter (delim.co alternative)JSON Formatter & ValidatorSQL Formatter & CheckerURL Encoder & Query ParserJWT DecoderHash Generator (SHA)UUID Generator (v1–v7)ULID Generator & DecoderTimestamp ConverterImage CompressorImage Crop & ResizeJSON Diff CheckerBackground RemoverJSON to CSV ConverterRegex TesterPassword GeneratorText Case ConverterColor ConverterMarkdown Preview & ExportXML Formatter & ValidatorQR Code GeneratorText Diff CheckerImage to Base64 / Base64 to ImageImage Downloader & ResizerVideo Downloader & EditorLorem Ipsum GeneratorYAML ↔ JSON ConverterCSV Viewer & TableCron Expression BuilderChmod CalculatorHTML Entities EncoderNumber Base ConverterFavicon GeneratorSitemap.xml GeneratorMeta Tag GeneratorLine Toolkit: Sort & DedupeCurl Converter (curl ↔ Code)SEO Checker (HTML Audit)ROT13 & Caesar CipherMorse Code TranslatorURL Slug GeneratorText to Binary / Hex ConverterCSS Formatter & MinifierTOML ↔ JSON ConverterINI ↔ JSON ConverterPhone Number FormatterCard Number Checker (Luhn)Number to Words ConverterTable Generator (Markdown/ASCII/HTML).env ↔ JSON ConverterCSV to JSON ConverterList Shuffler & Random PickerWord Counter & Text StatsDate CalculatorFake Data Generator (CSV)Unit ConverterSubnet Calculator (IPv4 CIDR)Aspect Ratio CalculatorSVG OptimizerImage Color Palette ExtractorImage Metadata ViewerTone Generator & WAV DownloadVoice Recorder (Mic → File)Metronome (30–240 BPM)Video Metadata InspectorCSS Gradient GeneratorBox-Shadow Generator.gitignore GeneratorNano ID GeneratorBase32 Encode / DecodeHexdump ViewerUnicode InspectorGzip + Base64 CompressorAuthenticator (TOTP Codes)Vigenère CipherJSON → TypeScript / SchemaJava .properties ↔ JSONMarkdown TOC GeneratorGraphQL Formatter & MinifierHTML Formatter & MinifierString Escaper (JS/JSON/Regex/Shell)Text Column AlignerFind & Replace (Regex)JSONPath EvaluatorXML ↔ JSON ConverterWorld ClockHMAC Generator (SHA)UUID Inspector & ValidatorDNS Lookup (DoH)HTTP Status Code LookupMIME Type LookupEmoji Picker (Click to Copy)Dice Roller & Coin FlipBill Splitter + TipPercentage CalculatorLoan / Mortgage CalculatorAge CalculatorImage Rotate / Flip / FilterQR Code ReaderEAN-13 Check DigitImage Splitter (Tiles)Meme GeneratorBefore / After Compare SliderImage Watermark AdderAudio Trimmer → WAVSubtitle Converter (SRT ↔ VTT)Video Thumbnail CaptureScreen Recorder → WebMAudio Joiner → WAVNoise Generator (White/Pink/Brown)README GeneratorOpen-Source License GeneratorTest Card Numbers (Sandbox)Placeholder Image GeneratorCSS Pattern GeneratorApp Icon Set Generatorrobots.txt Buildersecurity.txt Generator (RFC 9116)Mock API Server (HTTP/RPC)Webhook Inbox & TesterMermaid Diagram EditorPlantUML Diagram EditorgRPC Mock Server (grpcurl)Conventional Commit Builder

Age Calculator

Calculate exact age online: years/months/days, total days lived, weekday born, next-birthday countdown.

Age calculator

Age

31 years, 3 months, 3 days

Total days

11,418

Born on

Thursday

Next birthday

270 days

How to use

  1. Pick the birthdate.
  2. Read years/months/days, total days, weekday born.
  3. Check next-birthday countdown.

FAQ

Leap birthdays?

Feb 29 math follows calendar rollover — age ticks on Mar 1 in non-leap years.

Timezone?

Your browser's local dates — travel across the line and it may shift by a day.

Related data tools

Delimiter Converter (delim.co alternative)

Convert CSV, TSV, pipes, custom delimiters.

Timestamp Converter

Unix time ↔ human date, ISO, UTC.

JSON Diff Checker

Compare two JSONs, highlight added/removed/changed.