An awesome list of hosted tools for web development.
- Media Queri
- Screensiz
- Sizzy
- Polypane
- Responsive Tool
- CurlShot Mobile Screenshot - Screenshot any page as it renders on a phone or tablet (screen size, pixel density, mobile user agent), no account needed.
- AppShot - Free in-browser App Store & Google Play screenshot maker (device frames, captions, exact required store sizes). Nothing uploaded.
- favicon-generator
- favicon.cc
- xiconeditor
- tool.lu favicon
- bitbug
- favicomatic
- RealFaviconGenerator
- favicon.io
- Toolio.it - Favicon generator - Free favicon generator, converts an image into all standard favicon sizes.
- Mzu FaviconDL
- Favikit - Private in-browser favicon & app-icon generator (real multi-size .ico, Apple touch, Android, web manifest). Nothing uploaded.
- neumorphism css generator
- css-triangle-generator
- csszengarden
- CSS Gradient Generator
- cssBeutify
- css spritegen
- csssprites
- css Should I Prefix
- CSS Unit Converter
- ImgFlow - Compress and convert images (PNG/JPG/HEIC/WebP/AVIF) in the browser; core processing stays on-device
- webresizer
- TinyPNG
- AlloyPhoto
- Compressor.io
- Shrinkray
- Trimage
- Compress-Or-Die
- BulkPicTools
- FileOnTap - Free HEIC to PNG converter that runs 100% in the browser, no uploads
- BatchSet - Compress, resize or convert a whole folder of images at once, in the browser, nothing uploaded
- JFIF to JPG - Free JFIF to JPG/PNG converter that runs 100% in the browser, no uploads, no re-compression
- PageSpeed
- Webkaka
- GTmetrix
- Redirect Checker - Analyze HTTP redirect chains and measure performance impact
- nipponcolors
- flatuicolors
- Color Thief
- color-hex
- colors
- chuantongsecai
- colourco.de
- flatuicolorpicker
- krmp.cc
- Image Color Picker
- Respresso
- Google Fonts
- Adobe Fonts
- dafont
- youziku
- qiuziti
- fonts2u
- webfonts
- justfont
- iconpark
- FontSquirrel
- Respresso
- Brick
- CodePen
- CodeSandbox
- JSFiddle
- JS BIN
- Dabblet
- Coddy
- Plunker
- Liveweave
- StackBlitz
- FastSitePHP
- DataFormsJS
- AnyChart Playground
- Windframe
- Particle Logo - Turn a logo into a particle animation in the browser, then export dependency-free HTML, Vue 3 and React components, or video and GIF.
- TryDocsy - Free, 100% browser-based PDF editing, image processing, and document conversion suite.
- WebToolkit Pro
- FreeToolBox
- Hreflang checker
- giga.tools
- Facecam free tools - Free browser webcam test, mic test, soundboard and voice changer, no sign-up.
- UGCLive free tools - Free browser tools for creators: best time to post, engagement rate calculator, hook and caption generators, teleprompter, no sign-up.
- IPCalcPlus
- Toolio.it - Free hub of 155+ Italian web tools: calculators, unit/file converters, QR code and password generators, text utilities — no sign-up, mostly client-side.
- JieBang Tools - 170+ free online tools for developers — JSON formatter, Base64 encoder, QR code generator, and more. All client-side, no signup required.
- Mydentify AI Crawler Access Checker - Free, no-signup checker for robots.txt, page-level crawler directives, and ChatGPT and Claude crawler access responses.
- ogkit - Free in-browser Open Graph / social card generator (1200×630, meta-tag snippet). Nothing uploaded.
- SheetRender - Free browser-based PDF tools to merge and split PDFs, extract pages, and split mail merge PDFs.
- DevBox Tools
- Mello
- BeginThings - 96+ free browser-based tools for developers & freelancers
- MiniToolDesk - 100% client-side private developer toolbox with zero ads, native Web Crypto, AI prompt data sanitizer, and code generation matrix.
- Benchvale Base64 - Base64 encoder and decoder that runs in the browser, accepts the standard and URL-safe alphabets, re-adds missing padding, and ignores line breaks.
- cv.cm - 110+ free tools that run in the browser: JSON formatter, Base64, hash, JWT decoder, regex tester, cron and timestamp converters, plus image resize/convert, PDF merge/split, QR codes and a few device tests (mic, keyboard). No sign-up, 8 languages.
- All Tools Verse - Free collection of browser-based utilities for formatting, encoding, conversion and API work. No sign-up.
- DevToolbox - 30 free developer tools: JSON formatter and diff, regex tester, JWT decoder, Base64, hashing, cron parser, YAML and CSV converters. Everything runs client-side, no sign-up.