humanizerThe Prompt Index
A restrained free rewrite kept the facts intact. Its Compare tab makes inserted and removed words visible, with clear run-based limits.
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Original and rewritten result
Guest / General / Standard / Remove AI fingerprints on. Same benchmark; first complete output. Open any screenshot to inspect the original capture.
Original · 93 words
A local library tested a four-day schedule for six weeks. It kept the same 40 weekly opening hours, closing Wednesdays and extending Monday and Thursday evenings. Visits rose from 1,200 to 1,320 a week, although Wednesday visitors had to change plans. Staff reported fewer interruptions, but productivity was not measured. Longer evenings may help people who work during the day; this does not prove every library should open fewer days. Before making the change permanent, the team will survey residents, compare costs and repeat the trial in winter, when travel habits may differ.
First rewrite
A local library tested a four-day schedule for six weeks. It kept the same 40 weekly opening hours by closing on Wednesdays and extending Monday and Thursday evenings. Weekly visits rose from 1,200 to 1,320, though Wednesday visitors had to change their plans. Staff reported fewer interruptions, but nobody measured productivity. Longer evenings may suit people who work during the day, but the trial doesn't show that every library should open fewer days. Before making the change permanent, the team plans to survey residents, compare costs and repeat the trial in winter, when travel habits may be different.
Parameters and feature comparison
Observed features refer to the tested plan. “Not verified” is different from “not supported.”
| Parameter | The Prompt Index |
|---|---|
| Free access | Guest: 5 runs per calendar month, 5,000 characters per run. Free account: 10 runs per 30 days, 10,000 characters per run. |
| Account required | No, for the tested guest workflow. |
| One-click rewrite | Yes; General / Standard produced a complete rewrite. |
| Word highlighting | Yes. The Compare tab marks inserted and deleted words. |
| Line / sentence highlighting | No separate line diff verified. Sentence-specific generation was not tested. |
| API / MCP / Agent Skills | No official humanizer integration verified. The site’s general Skill Generator is a separate tool. |
| Basic | $9.99/month, 100 runs and 25,000 characters per run; daily caps also apply. |
| Pro | $29.99/month, 1,000 runs and 50,000 characters per run; daily caps also apply. |
| Billing unit | Runs plus a character limit per request, rather than a monthly word bank. |
Score breakdown
| Dimension | Weight | Score | What we found |
|---|---|---|---|
| Meaning & facts | 30% | 10/10 | Retained the schedule, numbers, productivity limitation and conditional winter follow-up without adding evidence. |
| Readability | 25% | 9/10 | Clear, grammatical sentences with small useful simplifications. |
| Natural voice | 15% | 8/10 | Natural but restrained editing; the first sentence remains unchanged. |
| Editing experience | 15% | 8/10 | Compare tab visibly marks inserted and deleted words. Copy and rerun controls are available; sentence-specific rewriting was not established. |
| Access & value | 10% | 8/10 | The full sample worked without signup. Guest and paid allowances distinguish runs, characters and renewal periods. |
| Integrations | 5% | 0/10 | No official humanizer API, MCP or agent skill was verified. This is a score of verified availability, not proof of absence. |
Overall 8.5/10 · weighted editorial judgment of the shown workflow. Read the method.
The Prompt Index AI Humanizer review: a useful word-by-word comparison
A faithful first rewrite and a readable word diff made this one of the easier results to check. The free quota is measured in runs and characters, so review those limits before choosing a subscription.
Read the analysis and recommendationSources and limits
- Official editor, Compare tab and usage/pricing table · checked 2026-10-27
One English passage and the first guest Standard output. Paid plans, external detectors and integrations were not run. A vendor timer is not a controlled speed benchmark.
