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Browser Extensions · head to head

ColorZilla vs ProWritingAid

ColorZilla logo

ColorZilla

Browser Extensions

Advanced color picker and eyedropper

From
Free
Rated
-
Full reviewWebsite
ProWritingAid logo

ProWritingAid

Browser Extensions

AI writing assistant and grammar checker

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: ColorZilla no pricing information published on main website or pricing page, making cost structure unclear to potential users; ProWritingAid free plan limited to 500 word count with only 2 report runs per day
  • They diverge on capability: ColorZilla covers Color picker, ProWritingAid covers Grammar checking.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which ColorZilla and ProWritingAid actually diverge.

Attributes where ColorZilla and ProWritingAid differ
AttributeColorZillaProWritingAid
Pricing modelfreefreemium
PlatformsChrome, Firefox, EdgeWeb, Windows, Mac, Chrome, Firefox, Edge
Founded20072013

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Browser Extensions).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in ColorZilla

  • Color picker
  • Eyedropper tool
  • Gradient generator
  • Palette analyzer

Only in ProWritingAid

  • Grammar checking
  • Style analysis
  • Readability reports
  • Plagiarism checker
  • Safari support

Both cover

  • Chrome support
  • Firefox support
  • Edge support

What people use each for

The jobs each tool is most often brought in to do.

ColorZilla

  • Extracting exact color values from website designs instantlynot ProWritingAid
  • Generating CSS gradients without returning to Photoshopnot ProWritingAid
  • Analyzing and converting visual color palettes to codenot ProWritingAid

ProWritingAid

  • Grammar and style checking for writers and authorsnot ColorZilla
  • Story planning and structure analysisnot ColorZilla
  • Character and manuscript analysis for fiction writersnot ColorZilla
  • Integration with Microsoft Word, Google Docs, Scrivener, and Notionnot ColorZilla

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

ColorZilla

  • No pricing information published on main website or pricing page, making cost structure unclear to potential users
  • No free tier or trial option clearly advertised, limiting ability to test features before purchase

ProWritingAid

  • Free plan limited to 500 word count with only 2 report runs per day
  • Advanced AI features (50 Sparks per day, Chapter Critiques) only in Premium Pro tier
  • Desktop apps for Mac and Windows; iOS/Android support limited to specific integrations
  • Yearly subscriptions significantly more cost-effective than monthly (67% savings)

Pricing, plan by plan

ColorZilla

Free
  • FreeFree
    • Color picker
    • Eyedropper
    • Gradient generator

ProWritingAid

Free
  • FreeFree
    • Basic grammar and spelling checks
    • 500-word limit per check
    • 2 report runs daily
  • Premium$30/month
    • Unlimited word count
    • Unlimited rephrases
    • 5 Sparks daily
  • Premium Pro$36/month
    • All Premium features
    • 50 Sparks daily
    • 3 Chapter Critiques daily

Which should you pick?

Choose ColorZilla if

  • You need color picker.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge.
  • You also want eyedropper tool.
ColorZilla review

Choose ProWritingAid if

  • You need grammar checking.
  • You want to start without paying.
  • You work on Web, Windows, Mac, Chrome, Firefox, Edge.
  • You also want style analysis.
ProWritingAid review

Questions people ask

Is ColorZilla or ProWritingAid better?
Neither clearly leads. ColorZilla starts at Free and ProWritingAid at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ColorZilla or ProWritingAid?
ColorZilla starts at Free and ProWritingAid at Free.
Does ColorZilla or ProWritingAid run on more platforms?
ColorZilla runs on Chrome, Firefox, Edge. ProWritingAid runs on Web, Windows, Mac, Chrome, Firefox, Edge.
Can I use ColorZilla for free?
Both have a free tier, so you can try either at no cost before committing.
What is ColorZilla best used for?
ColorZilla is most often used for extracting exact color values from website designs instantly, generating css gradients without returning to photoshop, analyzing and converting visual color palettes to code. Of those, extracting exact color values from website designs instantly and generating css gradients without returning to photoshop are not what ProWritingAid is typically brought in for.
What can ColorZilla do that ProWritingAid cannot?
ColorZilla covers Color picker, Eyedropper tool, Gradient generator, Palette analyzer. ProWritingAid covers Grammar checking, Style analysis, Readability reports, Plagiarism checker. Both handle Chrome support, Firefox support, Edge support.

Answered from the vendors’ own pages

ColorZilla: How much does ColorZilla cost?

ColorZilla does not publish pricing on its website. The site describes browser extensions for Firefox and Chrome, plus an online CSS gradient editor, but cost information is not available. Users must contact the company directly or check browser extension marketplaces for availability and cost details.

Source
ProWritingAid: How much does ProWritingAid cost?

ProWritingAid is free. Premium plan costs $30/month ($120/year), and Premium Pro costs $36/month ($144/year). Both yearly plans offer significant monthly savings. Lifetime options cost $399 (Premium) or $699 (Premium Pro).

Source
ColorZilla: Is ColorZilla free to use?

The website does not specify whether ColorZilla tools are free or paid. While browser extensions are often offered free in extension stores, the online tools and their pricing model are not documented on the main site.

Source
ProWritingAid: Is there a free version of ProWritingAid?

Yes. The free plan includes basic grammar and spelling checks with a 500-word limit per check, 2 report runs daily, 10 rephrases daily, and 3 Sparks daily.

Source
ProWritingAid: What is the difference between Premium and Premium Pro?

Premium ($30/month) includes 25+ analysis reports and 1 Chapter Critique daily. Premium Pro ($36/month) adds 50 Sparks daily, 3 Chapter Critiques daily, live workshops, and group critique sessions.

Source
ProWritingAid: Does ProWritingAid offer a refund guarantee?

ProWritingAid offers a 3-day money-back guarantee for yearly and lifetime subscriptions. Monthly plans have no refund option.

Source
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