Free writing tool

See what makes your writing hard to read.

Get an instant report on clarity, readability, sentence rhythm, filler phrases, and passive voice. No signup. Your text never leaves this page.

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Analysis happens locally in your browser. Penlify does not upload or store text entered here.

What this analyzer checks

Useful signals, clearly labeled as estimates—not a fake promise that one score defines good writing.

Readability

Estimates how easy the draft is to process using sentence length and word complexity.

Rhythm

Checks whether every sentence has the same length or your writing varies naturally.

Directness

Flags filler phrases, long sentences, and likely passive constructions worth reviewing.

Use the score as a compass, not a verdict.

Technical writing may need longer sentences. Brand writing may intentionally break rules. The report shows where to look; you decide what fits the reader.