1
Scribens
scribens.comAlso covers browser extension and text tools
Scribens checks English grammar and spelling, including punctuation, agreement, conjugation, and word confusion.
Alternatives
The Best Harper Alternatives in 2026
15 alternatives2 free · 3 open source
Looking for something like Harper? Here are 15 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 2 are free or have a free plan and 3 are open source.
Harper checks grammar and spelling locally on a device, with an open-source project page for writers and developers.
Top picks at a glance
First suggestionScribensScribens checks English grammar and spelling, including…Free or freemium optionTableconvertTableConvert converts tables among formats such as Excel…Open source optionLinkspectorLinkspector checks content links through a GitHub Action…Another optionGrammarly Browser ExtensionGrammarly's browser extension checks grammar and clarity as…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Scribens | — | Not stated | Android, Browser extension, iOS |
| 2 | Grammarly Browser Extension | — | Not stated | Browser extension, Web |
| 3 | Linkspector | — | Yes | — |
| 4 | Harper | — | Yes | — |
| 5 | GetMarkdown | — | Not stated | Web |
| 6 | LLMSTXT.NEW | — | Not stated | Web |
| 7 | Convert Case | — | Not stated | Android, iOS, Web |
| 8 | Tableconvert | Free | Not stated | Browser extension, Web |
| 9 | Fonts Ninja | — | Not stated | Browser extension, iOS, Web |
| 10 | LanguageTool | — | Not stated | iOS, Web |
All Harper alternatives
2
Grammarly Browser Extension
grammarly.com/browserAlso covers browser extension and text tools
Grammarly's browser extension checks grammar and clarity as users write across websites.
3
Also covers llm and text tools · open source
Linkspector checks content links through a GitHub Action that runs with Reviewdog on pull requests.
4
Also covers text tools · open source
Harper checks grammar and spelling offline and is written in Rust, according to its repository.
5
GetMarkdown
getmarkdown.comAlso covers llm and text tools · same kind of online tool
GetMarkdown converts PDF, Office files, HTML, images, and audio into Markdown through browser-side file processing.
6
LLMSTXT.NEW
llmstxt.newAlso covers llm and text tools · same kind of online tool
LLMSTXT.NEW generates an llms.txt file for any website using a dedicated generator interface.
7
Convert Case
convertcase.netAlso covers browser extension and text tools · same kind of online tool
Convert Case changes text between uppercase, lowercase, sentence case, and other letter-case formats.
8
Also covers browser extension and text tools · same kind of online tool · free
TableConvert converts tables among formats such as Excel, CSV, JSON, Markdown, and LaTeX, and can generate data.
9
Fonts Ninja
fonts.ninja/toolsAlso covers browser extension and text tools · same kind of online tool
Fonts Ninja identifies fonts on web pages through a browser extension, with a hover interaction described on its site.
10
LanguageTool
languagetool.orgAlso covers text tools · same kind of online tool
LanguageTool checks grammar, punctuation, and spelling across more than 30 languages, with an AI writing assistant described on its page.
11
SearchDecode
github.com/bewf/SearchDecodeAlso covers browser extension and text tools
SearchDecode decodes Base64 strings pasted into a browser search bar, according to its extension description.
12
Grammarly
grammarly.com/grammar-checkAlso covers text tools
Grammarly checks grammar, spelling, and punctuation and offers writing suggestions, according to its page.
13
Also covers text tools · same kind of online tool · free plan
Outwrite offers an AI writing assistant that checks grammar and helps revise sentences, with browser and Google Docs integrations listed.
14
ProWritingAid
prowritingaid.com/grammar-checkerAlso covers text tools · same kind of online tool
ProWritingAid checks grammar and writing style and integrates with Word, Google Docs, and Scrivener.
15
Also covers text tools · open source
LanguageTool checks grammar and style across more than 25 languages, according to its project description.
No alternatives match this filter.
Alternatives to similar tools
Outwrite9 alternativesGrammarly Browser Extension12 alternativesLanguageTool9 alternativesLinkspector24 alternativesProWritingAid8 alternativesSearchDecode11 alternatives
What is the best alternative to Harper?
Based on features, tags and platforms, the closest alternatives to Harper are Scribens, Grammarly Browser Extension, and Linkspector.
Is there a free alternative to Harper?
Yes. Tableconvert and Outwrite are free or offer a free plan.
Are there open-source alternatives to Harper?
Yes: Linkspector, Harper, and Languagetool.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative