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Developer tools

Small everyday tools for developers — JSON, timestamps, Base64 and UUIDs — that run entirely in your browser.

Free · No sign-up · No watermark

Tools in this category

JSON FormatterFormat, validate and minify JSONUnix Timestamp ConverterEpoch time to date and backBase64 Encode / DecodeText and files to Base64 and backUUID GeneratorRandom v4 and time-ordered v7 UUIDs

Developer tools

Pasting API responses, tokens or config files into an online tool can leak secrets. These tools run only in your browser: the text you paste is never uploaded, logged or stored.

Each tool shows exactly what it does, with the rules it follows (for example UTF-8 for Base64 and RFC 9562 for UUID v4 and v7).

PDF Tools

PDF to WordTurn PDF text into an editable .docxPDF to JPGSave every page as a JPG imageCompress PDFMake PDF files smallerMerge PDFCombine several PDFs into oneSplit PDFExtract pages or split by rangeRotate PDFTurn pages 90°, 180° or 270°JPG to PDFTurn photos and images into a PDF

Image Tools

Compress ImageShrink JPG, PNG and WebP filesResize ImageChange width and heightHEIC to JPGConvert iPhone photos to JPGWebP to JPGTurn WebP images into JPGPNG to JPGSmaller files, white backgroundJPG to PNGLossless PNG copiesPNG to WebPSmaller WebP images from PNG or JPGJPG to WebPSmaller WebP images from JPGWebP to PNGConvert WebP to lossless PNGCrop ImageCrop to 1:1, 16:9, 4:5 or exact pixels

Text Tools

Word CounterCount characters, words and linesChinese ConverterSimplified ⇄ Traditional ChineseFull/Half-widthConvert full-width and half-width textRemove DuplicatesDelete repeated lines, optionally sortCase ConverterUPPER, lower, Title, camelCase, snake_case

Calculators

Mortgage CalculatorMonthly payment, interest and scheduleCompound Interest CalculatorGrowth with monthly contributionsDate CalculatorDays between dates, add or subtract daysBMI CalculatorBody mass index with WHO, Taiwan and Japan rangesPercentage CalculatorPercent of, percent change and moreAge CalculatorExact age in years, months and days

Design Tools

Logo Maker20 logo ideas from your brand nameFavicon Generatorfavicon.ico and app icons from text or an imageQR Code GeneratorQR codes for links, Wi-Fi, email and phoneProfile Picture MakerRound profile photos with rings and coloursYouTube Thumbnail Maker1280×720 thumbnails with bold textSocial Media Image MakerInstagram, Facebook, X, LinkedIn and Pinterest sizesMeme GeneratorTop and bottom text on your own imageColor Palette GeneratorHarmonious palettes or colors from a photoCSS Gradient GeneratorLinear, radial and conic gradients

Video Tools

Compress VideoMake MP4, MOV and WebM files smallerTrim VideoCut a clip by start and end timeVideo to GIFTurn a short clip into an animated GIFTransition Clip MakerShort transitions between two shotsStoryboard to VideoKeyframes + transitions → MP4Merge VideosJoin several clips into one MP4Vertical Video 9:16Make horizontal video 1080×1920 for ShortsExtract FrameSave the first, last or any frame as PNGAdd SubtitlesBurn SRT or script subtitles into videoAdd Watermark to VideoPut your logo in a corner of a videoAdd Music to VideoBackground music with volume and fadesExtract Audio from VideoSave the soundtrack as M4ARemove Audio from VideoMute a video without re-encodingRemove Silence from VideoCut silent pauses automaticallyConvert Video to MP4WebM, MOV or HEVC to compatible H.264 MP4