Number 1: 
Tsubami
Free image and PDF tools that process files in your browser without upload or account
- PDF tools
- DR 0 no change since last check
PDF tools
Cromagnon
Free private studios and tools for PDFs, documents, spreadsheets, data, images, slides, study, citations, maths and code, all running in your browser
- Community votes
- 0
- DR by Ahrefs
- 9 no change since last check
Ahrefs Domain Rating benchmarked 26 Oct 2026, rebuilt 26 Oct 2026.
Cromagnon metrics
| Metric | Value |
|---|---|
| Domain Rating | 9 no change since last check |
| Trust Flow | 0 no change since last check |
| Citation Flow | 0 no change since last check |
| Referring domains | 0 no change since last check |
| External backlinks | 0 no change since last check |
Ahrefs Domain Rating benchmarked 26 Oct 2026, rebuilt 26 Oct 2026. Majestic benchmarked 26 Oct 2026, rebuilt 26 Oct 2026. Link data built by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
Cromagnon domain build sheet
| Domain age | 10 days |
|---|---|
| Registered | |
| Expires | |
| Registrar | Namecheap Inc. |
| DNSSEC | Not signed |
Ten free browser-based studios with 60+ tools for editing PDFs, Word documents, Excel spreadsheets, CSV files, presentations, images, and flashcards, with no
What it is
Cromagnon provides ten complete workspaces (studios) and over sixty quick tools for working with files directly in your browser. Each studio is a full application for a specific task: PDF editing with annotation, signing and OCR; Word document writing and formatting; Excel spreadsheet editing with working formulas; CSV data cleaning and reshaping; presentation building; image editing; flashcard study with the FSRS memory model; citation formatting in multiple styles; mathematical problem solving; and invoice creation. All tools run entirely on your device with no file uploads, no account required, and no watermarks or daily limits. Files are processed in your browser, work offline when installed as an app, and support 107 languages including right-to-left scripts.
What it is built with
- PDF annotation, highlighting, text and image insertion, signing, redaction, merging, splitting, reordering, compressing, form filling, password protection and OCR
- Word document creation with real DOCX file format export
- Excel spreadsheet editing with working formulas
- CSV data cleaning, reshaping and charting
- Flashcard study with FSRS memory model and eight study modes
- Citation formatting in APA, MLA, Chicago, Harvard, IEEE and 13 more styles
- Mathematical problem solving with step-by-step answers
- Photo editing with color grading, compression and format conversion
- Offline installation as browser app with sync on reconnect
- Support for 107 languages and right-to-left scripts
Pricing
Pricing model: Free
All studios and tools are free with no watermarks or daily limits. A free account adds sync between devices and 50 MB of cloud files, with no charge.
Compare and explore
Questions from the bench
- Is Cromagnon really free?
- Yes. Every studio and tool is free to use with no watermarks, no daily limits and nothing to buy. A free account optionally adds sync between devices and 50 MB of cloud files.
- Are my files uploaded to a server?
- No. Files are opened and processed inside your browser on your device. They are only sent to servers if you choose to sync, publish a deck to the library, or share with a class.
- Do I need an account?
- No. Everything works without signing up and your work autosaves in your browser. A free account adds sync between devices, the public deck library and classes.
- Can I edit a PDF for free?
- Yes. PDF Studio lets you annotate, highlight, add text and images, sign, redact, merge, split, reorder, compress, fill forms, protect with a password and make scans searchable with OCR.
- Does it work offline?
- Yes. You can install Cromagnon as an app from your browser, and the studios you have opened keep working with no internet connection. Changes sync when you go back online.
Find Cromagnon online
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