Everything you need to work with documents. PDF tools, image editor, AI writing assistant. No account, no uploads, no tracking, no installation. Open and use.
Live: darkenamber.github.io/ZeroOffice
ZeroOffice is a single HTML file. Open it in any browser — no installation, no backend, no server, no account. Everything runs locally on your device.
One file. Zero setup. Full office toolkit.
| Tool | Description |
|---|---|
| PDF Merger | Combine multiple PDFs into one. Drag to reorder. |
| PDF Splitter | Extract pages, split all, or split into chunks. |
| PDF Compressor | Reduce file size. Best for scanned documents. |
| PDF ↔ Images | Convert images to PDF or extract pages as PNG/JPG. |
| PDF Watermark | Add permanent text watermark to every page. |
| Tool | Description |
|---|---|
| Image Compressor | Compress JPG/PNG/WEBP with quality slider. Batch support. |
| Image Resizer | Resize by pixels, percentage, or preset (HD, 4K, Instagram...). |
| Image Converter | Convert between PNG, JPG, and WEBP. |
| Image Editor | Rotate, flip, brightness, contrast, saturation, blur. |
| Tool | Description |
|---|---|
| Word Counter | Words, characters, sentences, reading time, top words. |
| Case Converter | UPPER, lower, Title, camelCase, snake_case, kebab-case and more. |
| Text Diff | Compare two texts and highlight differences line by line. |
| CSV Tools | View CSV as table, search, sort. Convert CSV ↔ JSON. |
| Chart Builder | CSV → Bar, Line, Pie, Doughnut charts. Export PNG/SVG/Excel/HTML. |
| Tool | Description |
|---|---|
| Meeting Cost | Live cost counter for meetings. |
| Security & Privacy | Full transparency about data practices. |
| Tool | Description |
|---|---|
| Currency | Live exchange rates. Cached 1 hour. No API key needed. |
| Unit Converter | Length, weight, temperature, area, volume, speed, data. |
| Tool | Description |
|---|---|
| Excel Formula Generator | Describe what you need → get the formula. Excel & Google Sheets. |
| Invoice Generator | Fill in details → AI generates a professional invoice. |
| OCR + AI Cleanup | Upload a photo → get clean, structured text. |
| Email Rewriter | Rewrite, improve, shorten, fix grammar. Choose tone and language. |
| Document Summarizer | Paste any document → key points, TL;DR, or action items. |
| Contract Analyzer | Plain-language explanation of contracts with risk highlights. |
| Letter Writer | Describe what you need → AI writes a professional business letter. |
- Your files never leave your device — all processing is local in your browser
- No account, no registration, no email required
- No ads, no data selling
- AI tools send data directly to Anthropic API — ZeroOffice is not in the middle
- No analytics, no tracking scripts, no data collection of any kind
AI tools use the Claude API by Anthropic.
- Create an account at console.anthropic.com
- New accounts receive ~$5 in free credits — no credit card required
- Go to API Keys → create a key
- In ZeroOffice open AI Setup and paste your key
- Key is stored only in your browser's localStorage — we never see it
zerooffice/
└── index.html ← the entire product (~480KB, single file)
- No build step, no npm, no Docker
- No backend, no server, no database
- 3 themes: Dark (default), Light, Retro 8-bit
- EN/RU bilingual interface
- Works offline (except Currency Converter and AI tools)
- pdf-lib — PDF manipulation
- PDF.js — PDF rendering
- JSZip — ZIP creation
- Chart.js — Charts
- ExcelJS — Excel export
| Product | Description | Link |
|---|---|---|
| 🛠️ IT Tools | Developer and IT utilities | darkenamber.github.io/DarkenAmber-it-tools |
| 🗂️ ZeroOffice | Document tools for everyone | This repo |
| 📱 Social Tools | AI social media content creation | Coming soon |
If ZeroOffice saves you time:
MIT — see LICENSE
Built with ❤️ by DarkenAmber