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StackTools vs Private Writing Assistant

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

StackTools compared with Private Writing Assistant
DetailStackTools logo StackToolsPrivate Writing Assistant logo Private Writing Assistant
What it doesPrivate browser tools for everyday work Spelling and grammar checks in 101 languages, run entirely on your device
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree Free
PricingNot given Not given
Key features
  • PDF merge, split and compress
  • Convert Word, Excel, images to PDF
  • OCR, redact and protect PDFs
  • Compress images (JPG, PNG, WebP, AVIF)
  • Convert HEIC images
  • Background removal
  • On-device image upscale
  • Works offline after first load
  • No signup required
  • 101 languages supported with automatic language detection
  • Runs on device using Chrome's built-in AI model
  • Works in email drafts, Google Docs, and Google Slides
  • Fix single mistakes or all corrections at once
  • Toggle checking on and off with visible AI status
What makes it different
  • Files process in your browser with no uploads to servers
  • No account, no credit card, no friction
  • Works offline after first visit
  • Nothing sent to servers - all processing happens on your device
  • Supports 101 languages with automatic detection
  • Uses Chrome's native AI - no external model required
  • Works seamlessly across text boxes, email, docs and slides
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)8 no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)40
Citation Flow (Majestic)140
Referring domains (Majestic)40

4 details filled in for both companies.

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