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Feature checklists make every tool look equivalent. This table leads with the three things that actually differ — what it costs you before it works, whether your files leave your device, and where the free version stops.
| Rewordifyrewordify.com | Calmly Writer Onlinecalmlywriter.com | Hemingway Editorhemingwayapp.com | LanguageToollanguagetool.org | |
|---|---|---|---|---|
| What it does | Rewrites difficult English into simpler words, keeping the meaning | A blank page with a focus mode that dims everything but this sentence | Highlights the sentences nobody is going to finish reading | Open-source grammar checking across more than twenty languages |
| What it costs you | No sign-upWorks the moment the page loads. No account, no email, no trial. | No sign-upWorks the moment the page loads. No account, no email, no trial. | No sign-upWorks the moment the page loads. No account, no email, no trial. | No sign-upWorks the moment the page loads. No account, no email, no trial. |
| Your files | Runs on their server | Runs on your device | Runs on your device | Runs on their server |
| Where it stops | It substitutes vocabulary rather than restructuring, so genuinely tangled sentences stay tangled. | Documents live in browser storage unless you save to a file, and the free web version does not sync between devices. | The free web version has no saving, no export and no rewriting — those live in the paid desktop app. | The free tier caps how much text you can check in one pass and holds the rewriting features for Premium. |
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| Category | Writing & Text | Writing & Text | Writing & Text | Writing & Text |
| Last checked | 2026-07-29 | 2026-07-29 | 2026-07-29 | 2026-07-29 |
| Open the site | Open | Open | Open | Open |
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