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OpenDocScan vs Tsubami

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

OpenDocScan compared with Tsubami
DetailOpenDocScan logo OpenDocScanTsubami logo Tsubami
What it doesFree document scanner that runs in your browser with no upload, no account, no watermark Free image and PDF tools that process files in your browser without upload or account
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelOpen source Free
PricingFree, no paid tier All tools are free with no account, subscription or credit card required.
Key features
  • Find and straighten page edges automatically
  • OCR text recognition for searchable PDFs
  • Lighting correction and image enhancement
  • All processing happens locally on device
  • Works offline after page load
  • No account or sign-up required
  • Add to home screen as web app
  • Adjustable page size and image quality
  • Search across all scanned documents
  • Image crop, edit, compress and convert
  • PDF organization, editing, signing and conversion
  • Batch processing up to 20 images or 10 PDFs for merging
  • File size limits of 25 MB per file, 60 MB total
  • Support for JPG, PNG, WebP, GIF, BMP, SVG and TIFF formats
  • PDF page operations up to 300 pages total
  • AES-256 password encryption for PDFs
  • No account or login required
  • Download files individually or as ZIP archives
What makes it different
  • Entirely client-side with zero data upload—privacy verifiable in Network panel
  • Open source under MIT or Apache-2.0 with code publicly auditable
  • No watermarks, page limits, or paid tier—completely free
  • Advanced processing in 182 KB core written in Rust and WebAssembly
  • Works on any device with no installation via browser
  • Files process in your browser without uploading to any server
  • All tools are completely free with no subscription or account required
  • Honest limits disclosed upfront before choosing files
  • No artificial intelligence or OCR, only practical file operations
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)00
Citation Flow (Majestic)160
Referring domains (Majestic)40

5 details filled in for both companies.

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