Beampen — write prose they can't put down

Find rhythm, repetition, passive voice and monotony issues before your editor does. Or readers.

Grammarly makes it correct. Beampen makes it yours.

Beampen is a writing tool for macOS and Windows that colours every sentence by length, charts the rhythm of a page, puts sentences and phrases on their own lines with Soft Breaks, and counts syllables per line. It runs fully offline and your files stay on your machine. There is no AI in it.

What the four views do

• Colour overlay — short sentences turn blue, medium green, long amber, extra-long pink.
• Rhythm bar chart — the pattern of a whole page at a glance.
• Soft Breaks — every sentence, and every phrase you choose, on its own line, so a long sentence can be composed the way a stanza is composed.
• Syllable counter — a number in the right margin for each line: the difference between guessing at cadence and measuring it.

The report

Beampen grades sentence-length distribution, flags monotony runs (stretches of same-length sentences), measures adverb density and passive-voice frequency, groups repeated words with Levenshtein matching, and finds sound patterns — alliteration, rhyme, consonance and homonym groups.

Pricing

The web playground is free: up to ten files in your browser's local storage, fifty thousand characters per document. The desktop app removes both limits — unlimited projects and files — for a one-time payment of $29.99: a perpetual licence for one device, lifetime updates, 30-day return guarantee. Local and private, or point it at your own iCloud, Dropbox or Drive folder. Buy Beampen for Desktop.

Questions, answered

Who is this for?

Novelists, short story writers, editors, poets, screenwriters and essayists who want their sentences to flow effortlessly. It is for anyone who doesn't need another grammar checker but a tool that shows rhythm and musicality.

Why do I need this?

Beampen helps you train your literary rhythm. It visualises sentence length, repetition, passive voice and sound patterns so you can spot what your eye often misses; it lets you experiment and develop a unique style.

Is there AI involved?

No. Zero AI suggestions, zero auto-rewrites. Beampen only measures and visualises what you've already written. Every word, phrase and sentence stays 100% yours.

Can I paste AI-written text here?

Absolutely. We don't judge. Any writing, be it composed by a human or a robot, deserves a rhythm check.

Is it really a one-time price?

Yes. Pay once and forget. All future updates included.

Will poets benefit from it?

Absolutely. Enhance rhythm by varying the sentence length and monitor the syllable count to maintain (or break) the flow. Beampen lets you hear the cadence of a stanza before you commit to it.

Is my writing private?

Yes. Your writing is yours. It is never used to train any model, shared, or sold.

Beampen — start here

Beampen is a writing tool. It colours your sentences by length. Short sentences turn blue. Medium ones turn green. Long ones turn amber. Very long ones turn pink. Nothing is uploaded. Everything runs in your browser.

Rhythm is not decoration. Rhythm is how a reader breathes. A reader who cannot breathe stops reading, and a reader who stops reading never finds out how good the argument was.

Rhythm — a demo

Try varying your sentence length. Short bursts create energy. Then let a longer sentence unfurl, stretching across the page as it gathers clause after clause. Cut it short again. Feel the contrast.

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