Tiny tools.
Big productivity.
A growing collection of tools for developers, writers, and creators. Fast, private, and free. Everything runs in your browser, so nothing gets uploaded, tracked, or stored.
Word Counter
Count words, characters, sentences, paragraphs, and reading time instantly.
Open ToolCharacter Counter
Count characters with and without spaces. Check platform limits for Twitter, Instagram & more.
Open ToolReading Time Calculator
Calculate how long it takes to read any text. Perfect for bloggers and content creators.
Open ToolLorem Ipsum Generator
Generate placeholder text in paragraphs, sentences, or words for your designs and mockups.
Open ToolText Case Converter
Convert text between uppercase, lowercase, title case, sentence case, camelCase, snake_case, and more.
Open ToolImage to WebP
Convert JPG, PNG, and GIF images to WebP format for faster websites.
Open ToolWebP to PNG
Convert WebP images to PNG format with full transparency support.
Open ToolWebP to JPG
Convert WebP images to JPG format quickly and easily.
Open ToolJPG to PNG
Convert JPG/JPEG images to PNG format with lossless quality.
Open ToolImage Compressor
Compress images to reduce file size while maintaining quality.
Open ToolSVG Optimizer
Clean and minify SVG files. Remove metadata, comments, and unused attributes.
Open ToolJSON Formatter
Format, beautify, minify, and validate JSON data instantly.
Open ToolBase64 Encoder/Decoder
Encode text to Base64 or decode Base64 strings back to plain text.
Open ToolURL Encoder/Decoder
Encode or decode URLs and query parameters. Handle special characters safely.
Open ToolColor Converter
Convert colors between HEX, RGB, and HSL formats. Pick colors visually.
Open ToolRegex Tester
Test and debug regular expressions with real-time matching, highlighting, and group extraction.
Open ToolCSS Minifier
Minify CSS code to reduce file size. Remove comments, whitespace, and unnecessary characters.
Open ToolHTML Minifier
Minify HTML by removing comments, whitespace, and unnecessary tags.
Open ToolTimestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Multiple format outputs.
Open ToolQR Code Generator
Generate QR codes for URLs, text, WiFi, and more. Download as PNG.
Open ToolMarkdown to HTML
Convert Markdown text to clean HTML. Live preview and copy-ready HTML output.
Open ToolJWT Decoder
Decode and inspect JSON Web Tokens. View header, payload, and signature instantly.
Open ToolUUID Generator
Generate random UUIDs (v4), timestamp UUIDs (v7), or bulk lists. Copy-ready output.
Open ToolYAML ↔ JSON Converter
Convert between YAML and JSON formats. Instant, validated, bidirectional.
Open ToolText Diff Checker
Compare two blocks of text side-by-side. See additions, removals, and changes highlighted.
Open ToolCSS Gradient Generator
Design beautiful linear and radial CSS gradients with live preview. Copy-ready code.
Open ToolKeyword Density Checker
Analyze keyword density, frequency, and distribution in your content for better SEO.
Open ToolMeta Tag Generator
Generate optimized meta tags for better search engine visibility.
Open ToolSlug Generator
Convert any text into clean, SEO-friendly URL slugs with proper hyphens and lowercase.
Open ToolWhy 3STF Tools
Tools that respect your time and privacy.
Most online tools are slow, covered in ads, behind signup walls, or secretly collecting your data. We built 3STF Tools for one simple reason: tools should just work. Every tool runs entirely in your browser. Your text, images, and passwords never leave your device.
Lightning Fast
Static-rendered pages, instant interactions. No waiting for servers.
Truly Private
Zero data leaves your browser. Works offline after first visit.
Always Free
No paywalls, no premium tiers, no surprise features locked away.