Frontend Dev Werkzeugkasten
Frontend Dev Werkzeugkasten online kostenlos. Verarbeitet Daten sofort in Ihrem Browser. Kein Upload, keine Registrierung, vollständig privat.
Local processingFrontend Dev Toolkit
A curated set of browser-based tools for frontend developers. All tools run locally in your browser — no code is uploaded to any server.
CSS
CSS Minifier
Minify CSS by removing whitespace and comments.
Minify CSS by removing whitespace and comments.
CSS Beautifier
Format and indent CSS for readability.
Format and indent CSS for readability.
CSS Animations
Generate CSS keyframe animations with preview.
Generate CSS keyframe animations with preview.
Color Picker
Pick colors and convert between HEX/RGB/HSL/CMYK.
Pick colors and convert between HEX/RGB/HSL/CMYK.
Color Palette Extractor
Extract dominant colors from an image.
Extract dominant colors from an image.
JS
JS Minifier
Minify JavaScript using Terser-compatible transforms.
Minify JavaScript using Terser-compatible transforms.
JS Beautifier
Format and indent JavaScript code.
Format and indent JavaScript code.
JSON Formatter
Format, validate, and minify JSON.
Format, validate, and minify JSON.
JSON to CSV
Convert JSON array to CSV format.
Convert JSON array to CSV format.
Regex Tester
Test regular expressions with live matching.
Test regular expressions with live matching.
HTML
HTML Minifier
Minify HTML by removing redundant whitespace.
Minify HTML by removing redundant whitespace.
HTML Entity Encoder
Encode/decode HTML entities.
Encode/decode HTML entities.
Meta Tag Generator
Generate SEO and Open Graph meta tags.
Generate SEO and Open Graph meta tags.
Performance
Image Compressor
Compress images (JPEG/WebP) with quality control.
Compress images (JPEG/WebP) with quality control.
Image Resizer
Resize images with aspect ratio preservation.
Resize images with aspect ratio preservation.
AVIF Converter
Convert images to AVIF format (smaller than WebP).
Convert images to AVIF format (smaller than WebP).
SEO
SEO Meta Auditor
Audit title, description, OG, and schema markup.
Audit title, description, OG, and schema markup.
Sitemap Generator
Generate XML sitemap from URL list.
Generate XML sitemap from URL list.
Robots.txt Generator
Generate robots.txt with crawl directives.
Generate robots.txt with crawl directives.
Hreflang Tag Generator
Generate hreflang tags for international SEO.
Generate hreflang tags for international SEO.
Encoding
Base64 Encoder
Encode/decode Base64 and data URLs.
Encode/decode Base64 and data URLs.
URL Encoder
Encode/decode URL components.
Encode/decode URL components.
Crypto
Hash Generator
Compute SHA-1/SHA-256/SHA-512 via Web Crypto.
Compute SHA-1/SHA-256/SHA-512 via Web Crypto.
UUID Generator
Generate RFC 4122 v4 UUIDs.
Generate RFC 4122 v4 UUIDs.
Why browser-based?
- Privacy: Your code and data never leave your machine.
- Speed: No network round-trip; results are instant.
- Offline: Works without internet after initial load (PWA).
- Free: No signup, no API keys, no usage limits.
Browse all tools in the category browser or use the search.
How to Use
Enter your input above. The result updates automatically. Use the copy button to copy the result.
Privacy
All processing happens in your browser. Your data is never uploaded to any server.
FAQ
Ist dieser Frontend Dev Werkzeugkasten kostenlos?
Ja, vollständig kostenlos. Keine Registrierung erforderlich.
Lädt dieses Tool meine Daten hoch?
Nein. Die gesamte Verarbeitung erfolgt lokal in Ihrem Browser. Ihre Daten verlassen niemals Ihr Gerät.