# Web Tools > Utilities for building and testing websites. URL: https://uttir.com/web-tools Tools in this category: 25 ## About this category Web development utilities for testing, formatting, and generating web-related artifacts. ## Tools - [HTTP Status Code Lookup](https://uttir.com/http-status-codes) — Look up any HTTP status code from 100 to 511 with plain-language explanations, searchable and filterable by category. - [Color Picker](https://uttir.com/color-picker) — Pick any color and copy it as HEX, RGB, or HSL. - [Color Screen](https://uttir.com/color-screen) — Fill your screen with any solid color to test a display, find dead pixels, clean dust off a monitor, or take a color reference shot. Click to go fullscreen. - [Typography / CSS Unit Converter](https://uttir.com/typography-converter) — Convert between CSS length units: px, pt, pc, in, cm, mm, em, rem, and %. Default 16px base. - [HTML Minifier](https://uttir.com/html-minifier) — Shrink HTML by stripping comments and collapsing whitespace. See byte savings in real time. - [CSS Minifier](https://uttir.com/css-minifier) — Shrink CSS by stripping comments, collapsing whitespace, and tightening punctuation. See byte savings live. - [JavaScript Minifier](https://uttir.com/js-minifier) — Quick JS minifier that strips comments and collapses whitespace. Best for trusted, simple code snippets. - [CSS Gradient Generator](https://uttir.com/css-gradient-generator) — Build linear and radial CSS gradients visually. Pick colors, drag stops, copy the CSS. - [User Agent Parser](https://uttir.com/user-agent-parser) — Identify the browser, OS, and device type from any user-agent string. Detects bots and crawlers too. - [Screen Resolution Checker](https://uttir.com/screen-resolution) — See your current viewport and screen size, device pixel ratio, color depth, orientation, and more. Useful for responsive design and bug reports. - [Color Picker from Image](https://uttir.com/image-color-picker) — Upload an image and click any pixel to get its HEX, RGB, and HSL color. Works entirely in your browser — your image never leaves your device. - [CSS Flexbox Playground](https://uttir.com/css-flexbox-playground) — Visual playground for CSS Flexbox. Adjust container and item properties with sliders, see the live layout update, and copy the generated CSS. - [CSS Grid Playground](https://uttir.com/css-grid-playground) — Visual playground for CSS Grid. Define rows, columns, and gaps, place items by area or line number, and copy the generated CSS. - [HTML to PDF](https://uttir.com/html-to-pdf) — Convert HTML to a PDF in your browser. Write or paste HTML, see a live preview, and download a print-ready PDF. No upload, no tracking, no server. - [CSS Box Shadow Generator](https://uttir.com/css-box-shadow-generator) — Visually design CSS box-shadows. Adjust offset, blur, spread, color, and inset. Stack multiple shadows for layered effects. Get the generated CSS instantly. - [CSS Border Radius Generator](https://uttir.com/css-border-radius-generator) — Visually design CSS border-radius values. Independent corner control, preset shapes, live preview, and copyable CSS. Includes the "organic" 8-value syntax. - [Meta Tag Preview](https://uttir.com/meta-tag-preview) — See how your page will look in Google search results, Twitter, Facebook, and LinkedIn — before you publish. Type a title and description, upload an image, and the preview updates live. - [Markdown Editor](https://uttir.com/markdown-editor) — Write Markdown on the left, see the rendered HTML on the right. Live preview, character / word / line counts, copy HTML or Markdown, drag-drop a file to open it. - [API Tester (HTTP Requests)](https://uttir.com/api-tester) — Make HTTP requests from your browser: GET, POST, PUT, DELETE, with custom headers and body. Import a cURL command, see the full response (status, headers, body) with timing. Free, in browser, no signup. - [Internet Speed Test](https://uttir.com/internet-speed-test) — Measure your download speed, latency, and jitter in the browser. Download-only: nothing is uploaded and nothing is tracked. - [Click Speed Test](https://uttir.com/click-speed-test) — Measure your clicks per second (CPS) over 1, 5, 10, or 30 seconds. Works with touch too, and keeps your personal best on this device. - [Reaction Time Test](https://uttir.com/reaction-time-test) — Measure your visual reaction time in milliseconds over five rounds, with a median score and per-trial breakdown. - [FPS Benchmark](https://uttir.com/fps-benchmark) — Measure your display's real refresh rate and frame delivery stability in a 10-second test. - [Scroll Performance Test](https://uttir.com/scroll-performance-test) — Auto-scrolls a sample panel at a constant speed and counts dropped frames, so you can see how smooth this device really is. - [Typing Latency Test](https://uttir.com/typing-latency-test) — Measure the rhythm between your keystrokes — median gap, steadiness, and longest pause. Different from a words-per-minute test. --- For the full HTML page, visit https://uttir.com/web-tools. This file is the markdown rendering at https://uttir.com/web-tools.md.