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Content Checker vs JSS Style Checker

Both stand on writing style checkers. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Content Checker

Free plan AndroidiPhoneMac+1

Content Checker combines style checks, a searchable guide, and URL suggestions, with a setting for HMRC-specific rules. The free app works offline; website checks use server processing, while the maker says submitted text is immediately discarded.

Visit Content Checker

JSS Style Checker

Free plan Open source APIExtensionSelf-hosted+1

JSS Style Checker offers several ways to check manuscript files, with local browser processing and CI support among its options. Treat its findings as guidance: the project says a clean result does not establish compliance.

Visit JSS Style Checker

The facts

Content CheckerJSS Style Checker
Free planYesYes
Open sourceNot publishedYes
Runs onAndroid, iPhone, Mac, WebAPI, Extension, Self-hosted, Web
Lowest paid planFree or on requestFree or on request
Plans published11
MakerNot publishedNot published
Websitecontentchecker.ukgithub.com
On writing style checkers#3 of 29#1 of 29

Content Checker: what it does well

  • Checks text against more than 140 rules.
  • Includes a searchable GOV.UK A-to-Z style guide.
  • Can suggest URL slugs using GOV.UK standards.
  • Free app works offline.
  • Website checks discard submitted text after processing, according to the maker.

What to know first

  • Website checks send submitted text to a server for processing.
  • Editor support is listed for web, iOS, and macOS.

JSS Style Checker: what it does well

  • Checks several LaTeX and related manuscript file types
  • Browser checker processes files locally via WebAssembly
  • Follows project references from a root manuscript file
  • Reviewer mode summarizes findings by category

What to know first

  • A clean run does not establish manuscript compliance
  • VS Code extension depends on a language server not yet shipped
  • DOI lookup is online and optional

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