About ToolBox Inside

ToolBox Inside is a free collection of online tools including calculators, image processing tools, and text utilities. All tools run locally in your browser — your data never leaves your device.

Our Philosophy

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Privacy First

All processing happens locally in your browser. No data is uploaded to any server.

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Fast & Easy

No registration required. Apple-inspired design for a smooth user experience.

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Bilingual

All tools and blog content available in both Chinese and English.

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Completely Free

All tools are free to use. Supported by non-intrusive advertising.

Tool Categories

📐 Calculators (16) — Mortgage, Tax, BMI, Date, Housing Fund, Compound Interest & more
🖼️ Image Tools (5) — Compression, Format Conversion, Resize, Base64, Color Picker
✏️ Text Tools (11) — Word Counter, JSON Formatter, Base64 Encode/Decode, UUID Generator & more

Tech Stack

Built with pure static HTML/CSS/JavaScript with zero dependencies (except Chart.js for charts). Deployed on Cloudflare Pages global CDN for fast access worldwide.

Contact

Have feedback or suggestions? Get in touch.