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152 free tools across 13 categories, all running on your device. Choose one to get started, or search the list below.

Image Tools PDF & Documents Developer Tools Text Tools Calculators Design & Color Generators File & Data Tools Web & SEO Tools Date & Time Tools Security & Privacy Math & Statistics Social Media Tools

HEIC to JPGTurn iPhone HEIC photos into standard JPGs, with no upload.WebP to PNGDecode WebP to widely supported PNG, keeping transparency intact.PNG to WebPShrink PNG payloads into WebP with an adjustable quality setting.SVG to PNGRasterize SVG vectors into PNG at the exact size you need.AVIF to PNGDecode modern AVIF images into editable, lossless PNG files.Image CompressorReduce JPG, WebP and PNG file size with a live before/after readout.Image ResizerResize by exact pixels, percentage, or fit-within-bounds.Image CropperCrop precisely with numeric coordinates, presets and a live overlay.EXIF RemoverStrip GPS, camera and timestamp metadata — without re-encoding.Image to Base64Encode any image into a ready-to-paste data URI or raw Base64 string.Merge PDFCombine several PDF files into one document, in the order you choose.Split PDFSeparate a PDF into individual pages or extract a page range.Images to PDFTurn JPG, PNG and WebP images into a single PDF, one image per page.JSON FormatterFormat, validate and minify JSON with clear error positions.Base64 Encoder / DecoderEncode text to Base64 or decode it back, with correct UTF-8 handling.UUID GeneratorGenerate RFC 4122 version 4 UUIDs using cryptographic randomness.Unix Timestamp ConverterConvert Unix timestamps to dates and dates back to seconds or milliseconds.Word CounterCount words, characters, sentences, paragraphs and reading time.Case ConverterConvert text between upper, lower, title, camel, snake and kebab case.Remove Duplicate LinesStrip repeated lines from a list while keeping the first occurrence.Percentage CalculatorWork out percentages, percentage of a value and percent changes.Date Difference CalculatorFind the days, weeks and weekdays between two dates.Color ConverterConvert colours between HEX, RGB and HSL with a live preview.Contrast CheckerCheck a colour pair against WCAG AA and AAA contrast thresholds.Rotate PDFTurn every page of a PDF by 90°, 180° or 270°, without redrawing content.Delete PDF PagesRemove listed pages from a PDF and keep the rest untouched.Extract PDF PagesCopy listed pages into a single new PDF, in the order you choose.Reorder PDF PagesRearrange pages into any order by listing the new sequence.Add PDF WatermarkStamp text over every page with adjustable size, position and opacity.Add Page NumbersStamp 1-based page numbers in the position and size you choose.Crop PDFTrim every page's visible area by fixed margins on each side.PDF to JPGRender every PDF page to a JPG image at the resolution you pick.PDF to PNGRender PDF pages to lossless PNG images with crisp text and flat colour.PDF to TextExtract the embedded text layer of a PDF, page by page.JSON to YAMLConvert a JSON document into clean, correctly indented YAML.URL EncoderPercent-encode or decode text and URLs, with strict and permissive modes.JWT DecoderRead a JWT's header and payload claims, with expiry times decoded.Hash GeneratorCompute SHA-1, SHA-256, SHA-384 and SHA-512 digests of any text.Regex TesterTest JavaScript regular expressions with live match highlighting.Cron ParserExplain a 5-field cron expression and show when it next runs.Sort LinesSort list lines alphabetically, numerically or by length.Remove Empty LinesStrip blank lines and tidy stray whitespace from pasted text.Find and ReplaceReplace every occurrence of a term or regular expression, live.Text DiffCompare two texts by line or word with a colour-coded diff.Color Palette GeneratorBuild a five-colour palette from one base colour using harmony rules.Gradient GeneratorCompose a two-stop CSS linear or radial gradient visually.CSS Shadow GeneratorDesign a box-shadow with sliders and copy the exact CSS.Favicon GeneratorRender a text favicon at every size browsers need, with the HTML snippet.Age CalculatorExact age in years, months and days, plus a birthday countdown.Unit ConverterConvert length, mass, temperature and data units precisely.Aspect Ratio CalculatorFind a ratio and compute the matching dimensions for a resize.JPG to PNGConvert JPG photos into lossless PNG with pixel-accurate output.PNG to JPGFlatten PNG images onto a solid background and encode as JPG.WebP to JPGDecode WebP images into universally supported JPG files.JPG to WebPShrink JPG photos into WebP, typically 25–40% smaller.Image RotatorRotate images by 90°, 180° or 270° in a single batch pass.Image FlipperMirror images horizontally or vertically with pixel-level flips.Batch Image ConverterConvert a whole batch of images into one chosen format.Image WatermarkStamp text or a logo over images with position and opacity control.JSON ValidatorValidate JSON syntax with the exact line and column of any error.JSON MinifierStrip whitespace from JSON without touching string contents.HTML Encoder / DecoderEscape HTML-critical characters, or decode entities back to text.URL ParserBreak a URL into protocol, host, port, path, query and fragment.Text to SlugTurn titles into clean URL slugs with configurable separators.Remove Extra SpacesCollapse repeated spaces and tabs while keeping line structure.Add Line NumbersNumber every line with a custom start, separator and padding.Text ReverserReverse characters, words or lines without breaking emoji.Percentage Change CalculatorMeasure the percent increase or decrease between two values.Discount CalculatorFinal price after a discount — or the original price before it.Compound Interest CalculatorProject a balance with interest frequency and optional deposits.BMI CalculatorBody Mass Index with the standard WHO weight category.Password GeneratorStrong passwords from the browser's cryptographic random source.Random Number GeneratorCryptographically secure integers in any range, unique if needed.Random String GeneratorSecure random strings from letters, digits or hex alphabets.Random Color GeneratorSecure random colours with HEX, RGB readouts and previews.Random Date GeneratorRandom UTC dates inside a range you define, in batches.YAML to JSONParse YAML with js-yaml and emit clean, formatted JSON.XML FormatterIndent XML for readability and verify tags close in order.SQL FormatterPretty-print SQL for your dialect with the sql-formatter engine.Markdown PreviewRender Markdown to sanitized HTML with live styling.QR Code GeneratorEncode text or URLs as QR codes, exportable as PNG or SVG.Barcode GeneratorRender scannable barcodes in eight formats as PNG downloads.Lorem Ipsum GeneratorClassic placeholder paragraphs and sentences, generated locally.Fake Data GeneratorFabricated names, emails, phones and addresses for tests.CSV ViewerView CSV files as a clean table with correct RFC 4180 parsing.CSV EditorEdit CSV cells in a grid and export clean, correctly-escaped CSV.CSV to ExcelConvert CSV into a real .xls workbook with typed numeric cells.Excel to CSVRead .xlsx workbooks locally and export the first sheet as CSV.CSV to JSONConvert CSV rows into a JSON array with optional type inference.JSON to CSVFlatten a JSON array of objects into CSV with unioned columns.CSV to XMLConvert CSV rows into row elements with per-column tags.XML to CSVFlatten repeated XML elements into CSV rows.JSON to XMLConvert a JSON object into clean, escaped XML.TSV to CSVConvert tab-separated values into comma-separated CSV.CSV DeduplicatorRemove duplicate CSV rows by full comparison or a key column.CSV Column ExtractorPull one CSV column out as a plain list.JSON Table ViewerRender a JSON array of objects as a readable table.JSON DiffCompare two JSON documents structurally, path by path.Meta Tag GeneratorGenerate complete head meta markup from your page values.Open Graph GeneratorGenerate og: and twitter: card markup for rich previews.Robots.txt GeneratorBuild a robots.txt from your crawl rules.Sitemap ValidatorValidate sitemap XML structure, URLs and dates locally.Schema Markup GeneratorGenerate JSON-LD schema for common page types.UTM BuilderBuild campaign-tagged URLs with utm parameters.Redirect CheckerFollow a URL redirect chain hop by hop.HTTP Header CheckerInspect response headers and audit security headers.Hreflang GeneratorGenerate rel=alternate hreflang link tags.Canonical URL CheckerRead a page canonical, robots and title tags from its HTML.Time Zone ConverterConvert an instant between IANA time zones.World ClockLive clocks across your chosen cities.Business Days CalculatorCount working days between two dates, skipping weekends and holidays.Countdown TimerLive countdown to any date-time, second by second.Time Duration CalculatorElapsed time between two clock times.Date CalculatorAdd or subtract days, weeks, months or years from a date.Week Number CalculatorISO 8601 week number for any date.Time Ago CalculatorHuman-readable relative time from any date-time.Password Strength CheckerEstimate password strength from entropy and weak patterns.File Checksum CalculatorSHA digests of a file to verify downloads.File Hash ComparatorCompare two files byte-for-byte via SHA-256.HMAC GeneratorKeyed message authentication with WebCrypto HMAC.JWT Signature VerifierCryptographically verify HMAC-signed JWTs.Text Encrypt / DecryptAES-256-GCM authenticated encryption in your browser.Average CalculatorMean, median, sum and range for a list of numbers.Median CalculatorThe middle value of an ordered list, outliers be damned.Standard Deviation CalculatorPopulation and sample standard deviation, clearly labelled.Fraction CalculatorExact fraction arithmetic with simplified results.Scientific CalculatorEvaluate expressions with a hand-written parser — no eval.Ratio CalculatorScale ratios: A:B with a new value for either side.GCD & LCM CalculatorGreatest common divisor and least common multiple.Number Base ConverterBinary, octal, decimal and hexadecimal, exactly.Prime Number CheckerPrimality test with full prime factorisation.Probability CalculatorCombinations, permutations and binomial probability.Loan CalculatorMonthly payment, total paid and interest for an amortising loan.Sales Tax CalculatorAdd tax to a net price or extract it from a gross price.Tip CalculatorTip amount, total and per-person share for a bill.Social Media Image ResizerCrop and scale images to platform-standard sizes.Hashtag FormatterTurn words into clean, CamelCase hashtags.Social Caption FormatterTidy captions: trim lines, collapse blanks, keep emoji.Social Character CounterCheck a post against every platform limit at once.YouTube Thumbnail PreviewSee your thumbnail inside a video-site style result card.GIF MakerTurn an image sequence into an animated GIF.Image SplitterCut an image into an even grid of tiles.Image MergerJoin images side by side or stacked into one PNG.XML to JSONParse XML into structured JSON with attribute support.CSS MinifierStrip comments and collapsible whitespace from CSS.JavaScript MinifierMinify JavaScript with the real Terser engine.Remove HTML TagsStrip markup and scripts, keeping visible text.HTML to MarkdownConvert HTML to clean Markdown with turndown.SVG OptimizerMinify SVG markup with SVGO.Placeholder Image GeneratorGenerate labelled placeholder PNGs at any size.QR Code ScannerDecode a QR code from an image file with jsQR.Passphrase GeneratorMemorable multi-word passphrases from crypto randomness.

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