Small tools.
Big impact.

Developer Tools

Our starting category: UUID Generator, Base64 Converter, Hash Generator, JWT Decoder, Regex Tester, Timestamp Converter and more — each one runs directly in your browser, with no server-side processing.

• UUID Generator — free UUID v4 in bulk, no signup
• Base64 Converter — encode and decode text instantly online
• URL Converter — free URL encoder and decoder online
• SHA-256 Hash Generator — free, also MD5 and SHA-512
• Password Generator — generate free secure passwords online
• Random String Generator — random test strings
• JWT Decoder — free JSON Web Token decoder online
• Timestamp Converter — convert Unix timestamp to date online
• Regex Tester — test regular expressions online
• Color Picker — free HEX to RGB and HSL converter

AI Tools

Handy tools for anyone working with AI models: calculate the exact token count for your prompt and mask recognizable data before sharing text.

• Token Counter — count GPT tokens free, no signup
• Text Anonymizersoon

Images

Convert and optimize without hassle: PNG to WebP, HEIC converter, compress, resize and crop images.

• Image Converter — convert between PNG, JPG, WebP and AVIF
• Compress an Image — free compressor, no upload
• Resize image — free image resizer, no upload
• Crop image — free image cropper, no upload
• Rotate image — free 90 or 180 degree rotation
• Social media image cropper — free and online
• Add watermark to photo — free, no upload needed
• Make a GIF from images — free, no upload required
• Replace a Color in an Image — free, no upload

Diagrams

Got diagram code from an AI assistant? See what it says: Mermaid, D2, DBML and BPMN.

• Mermaid Renderer — free diagrams from code, instantly
• DBML Renderer — database schema as an ER diagram
• D2 Renderer — view diagrams from D2 code
• BPMN Viewer — view process models from BPMN 2.0 XML

Content Tools

For content creators and developers: Markdown Renderer, HTML/XML/YAML Formatters and a clear CSV Viewer.

• JSON Formatter — pretty-print and validate JSON
• Markdown Renderer — preview and tidy markdown
• HTML Formatter — indent and tidy HTML online
• HTML to Markdown converter — free and online
• XML Formatter — indent and validate XML online
• CSV Formatter — check columns and quoting online
• YAML Formatter — check tabs, duplicates and indentation
• TOML Formatter — validate and tidy TOML online

Social Media

Post faster with a Hashtag Generator, Bio Generator, Fancy Text Generator and formatters for LinkedIn, Instagram and X.

• Unicode Generator — standout text for social media
• Fancy Text Generator — wide, upside down, small caps
• Social media image cropper — free and online
• QR code generator — free, with custom colours and logo
• URL shortener — create a free short link

SEO & AI visibility

Check whether search engines and AI assistants can reach, understand and present your page. Every finding explains what it means and what to do about it.

• Website check — test meta tags, sitemap and robots.txt
• AI visibility check — do you block ChatGPT or Claude?

• JSON-LD Generatorsoon
• UTM Buildersoon