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Highlight passive voice in your writing

AI identifies every passive voice sentence so you can decide what to rewrite.

Free AI Tool5 min read
Paste your writing here (100-5000 words)...
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Highlight passive voice in your writing

River's Passive Voice Highlighter identifies every passive voice construction in your writing. You paste any document, and the AI highlights passive sentences without changing your text or suggesting rewrites. Whether you're editing blog posts, revising proposals, or polishing marketing copy, you get a clear view of where passive voice appears so you can decide what needs fixing. The tool highlights only passive voice, nothing else.

Unlike comprehensive grammar checkers that overwhelm with feedback, we focus exclusively on passive voice detection. The AI understands passive voice patterns (was done, were created, is being handled, has been completed), flags every instance accurately, and lets you maintain control over edits. You get precise identification without AI rewriting your work or cluttering comments with other issues. See the problem clearly, then fix it your way.

This tool is perfect for all freelance writers improving clarity and impact, content marketers strengthening copy, business writers making proposals more direct, and anyone who knows passive voice weakens writing but struggles to spot it. If you've been told to reduce passive voice but can't identify it quickly, or if you want to catch passive constructions before submitting work, this tool helps. Use it on every draft before final editing.

What Makes Active Voice Stronger Than Passive

Active voice makes writing clearer, more direct, and more engaging. In active voice, the subject performs the action (Sarah wrote the report). In passive voice, the action happens to the subject (The report was written by Sarah). Weak writing overuses passive voice, making sentences vague and indirect (mistakes were made, the decision was reached, results were observed). Strong writing uses active voice by default, saving passive only for specific situations where it's actually better (when the actor is unknown, unimportant, or when you want to emphasize what happened over who did it).

Passive voice weakens writing in predictable ways. It obscures responsibility (mistakes were made doesn't say who made them). It adds unnecessary words (the report was written by Sarah has 7 words while Sarah wrote the report has 4). It distances the reader from the action (you were emailed vs we emailed you). It slows reading pace because readers must work harder to understand who did what. In most business and marketing writing, active voice outperforms passive by making messages clearer and more persuasive.

To improve your writing, catch passive voice and convert most instances to active. Change (the product was launched by our team) to (our team launched the product). Change (the decision was made to postpone) to (we decided to postpone). Keep passive voice only when the actor is truly unimportant (the building was constructed in 1920) or unknown (my car was stolen). Some scientific and academic writing uses passive intentionally to emphasize objectivity, but even in those contexts, overuse makes writing tedious. Most writers unconsciously overuse passive voice. Highlighting it makes the problem visible so you can fix it.

What You Get

Every passive voice sentence highlighted in your document

Focused feedback on passive voice only

No rewrites or changes to your text

Clean identification so you can edit your way

Fast review of any document up to 5,000 words

How It Works

  1. 1
    Paste your writingCopy your document (100 to 5,000 words) into the tool
  2. 2
    AI highlights passive voiceOur AI identifies and highlights every passive construction in 2 to 3 minutes
  3. 3
    Review highlightsSee exactly where passive voice appears in your document
  4. 4
    Rewrite as neededConvert highlighted sentences to active voice or leave them if passive is appropriate

Frequently Asked Questions

Will this rewrite my sentences or just highlight them?

It only highlights passive voice. The AI doesn't change your text or suggest rewrites. You see where passive voice appears, then you decide what to fix and how. This approach gives you full control. Some passive voice might be intentional or appropriate in context. Highlighting lets you make informed editing decisions rather than accepting automated rewrites that might miss nuance.

Is all passive voice bad and should I eliminate every instance?

No. Passive voice is appropriate when the actor is unknown (my wallet was stolen), unimportant (the building was constructed in 1920), or when you want to emphasize what happened over who did it (three mistakes were found in the report). The problem is overusing passive voice unconsciously. This tool shows you where it appears. You decide what to keep. Most writers should convert 70% to 80% of passive instances to active, keeping passive only when there's a good reason.

Can this check documents in any format?

Paste text content from any source (Word, Google Docs, email, website). The tool analyzes the text itself, not formatting. After seeing highlights, make edits in your original document. This works for any type of writing (blog posts, proposals, marketing copy, reports, emails) where passive voice weakens clarity and impact.

How accurate is the passive voice detection?

The AI accurately identifies standard passive voice patterns (was/were/is/are + past participle). Occasionally complex sentence structures might be missed or false positives occur, but accuracy is high for typical passive constructions. If something feels wrong, trust your judgment. The goal is catching most passive voice so you can improve writing, not achieving perfect detection. Even catching 90% of instances dramatically improves your editing.

What if I don't know how to convert passive to active voice?

Basic pattern: identify who/what is doing the action, make them the subject, and rewrite. Passive (The report was written by John) becomes active (John wrote the report). Passive (Mistakes were made) becomes active (We made mistakes) or (The team made mistakes). If you're unsure, ask (who is doing this action?) and make that the subject. With practice, converting passive to active becomes automatic. The hardest part is spotting passive voice, which this tool solves.

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