Tools
16Free utilities to help you move faster — simple, fast, and developer-friendly.
- Tool2026
PromGen
Generate structured prompts for AI coding assistants to build games.
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JSON Formatter
Format, validate, copy, and download JSON instantly.
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JSON to Model Converter
Convert JSON objects into strongly typed models across popular languages.
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Remove Background
Remove the background from any image instantly in your browser.
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Timestamp Converter
Convert UNIX timestamps into UTC, local time, ISO strings, and relative time.
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JWT Decoder
Decode JWT header and payload, then track expiration countdown instantly.
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AdSense Readiness Checker
Estimate AdSense readiness using content, policy, metadata, and trust checks.
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SEO Checker
Audit homepage SEO best-practice signals like metadata, structure, crawlability, and media tags.
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Markdown Viewer
Write and preview markdown live with line numbers, GFM support, and copyable code blocks.
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Open Graph Preview Tool
Analyze Open Graph tags, preview social cards, and get actionable optimization suggestions.
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API Request Playground
Build and test HTTP requests with JSON body validation, response tabs, and snippet generation.
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Web Performance Checker
Analyze Core Web Vitals and Lighthouse performance metrics with practical optimization suggestions.
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Image Editor
Compress and resize JPG, PNG, and WEBP images fully in-browser with no server upload.
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Astu's AvatarLab
A lightweight tool to generate and preview avatars.
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Astu's ImageConverter
Convert images quickly in the browser—simple and fast.
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Printama Sample App
Printama Sample App demonstrates Bluetooth thermal printer integration for Android developers and businesses. This demo application showcases the powerful capabilities of the Printama library, providing a comprehensive testing environment for thermal printing functionality.
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