20 Best Free Developer Tools in 2026 (No Signup Required)
Every tool here runs in your browser. No accounts, no ads, no tracking. Just paste, click, copy.
CSS Design Tools
CSS Gradient Generator #1
Linear, radial, and conic gradients with live preview. 12 curated presets. Copy CSS output instantly.
Box Shadow Generator #2
Multiple shadow layers, inset/outset, blur and spread controls. 7 preset styles to start from.
Glassmorphism Generator #3
Frosted glass UI effects with background blur, opacity, and border controls. Live preview on custom backgrounds.
Flexbox Playground #4
Visual flexbox builder. Adjust direction, wrap, justify, align — see the CSS update in real time.
CSS Grid Generator #5
Define grid columns, rows, and gaps visually. Generate clean CSS Grid code for any layout.
CSS Button Generator #6
Design buttons with border radius, gradients, hover states, and animations. Copy the full CSS.
CSS Animation Generator #7
Create @keyframes animations visually. Control timing, easing, delay, and iteration count.
Developer Utilities
JSON Formatter #8
Validate, format, and prettify JSON. Collapse/expand nodes. Syntax highlighting. Error detection.
Regex Tester #9
Live regex pattern matching with match highlighting. Test against custom input text.
Markdown Editor #10
Write Markdown, see rendered HTML in real time. Export as HTML. Split-pane layout.
Base64 Encoder/Decoder #11
Convert text ↔ Base64. Handles Unicode. Works with data URIs for embedding images.
URL Encoder/Decoder #12
Encode and decode URLs. Supports both encodeURIComponent and encodeURI modes.
Design & SEO
Color Palette Generator #13
Generate harmonious color palettes using HSL. Export as CSS variables, Tailwind config, or hex codes.
Contrast Checker #14
Check WCAG 2.1 contrast ratios between foreground and background colors. AA and AAA compliance.
Type Scale Calculator #15
Generate a modular type scale. Preview heading sizes. Export as CSS or Sass variables.
Meta Tag Generator #16
Generate HTML meta tags, Open Graph tags, and Twitter Card markup. Preview how your page looks when shared.
Lorem Ipsum Generator #17
Generate placeholder text by paragraphs, sentences, or words. Standard and hipster modes.
ShipReady Auditor #18
Audit your website for SEO, accessibility, performance, and security issues. Actionable checklist.
🔥 Career Tools (New)
Resume Roaster #19
Paste your resume, get brutally honest feedback. Scores metrics, keywords, structure, and level alignment. Share your score.
Developer Salary Calculator #20
Calculate your market-rate salary based on role, experience, location, and company type. 2026 benchmarks.
Free downloads to go with these tools
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