Legit.Show measured Kompres's Security frame at 25/100. No Content-Security-Policy and no HSTS. Served over HTTPS with a valid certificate.

How does Legit.Show measure Kompres?

Legit.Show scores seven frames — Performance, Accessibility, Security, Privacy, Reliability, Standards and Discoverability — deterministically from the public surface (URL, HTTP headers, real Lighthouse), with no LLM in the scoring path. See legit.show/methodology.

Productivity

Kompres

Last updated 2026-09-28 · benchmark measured 2026-09-28 — deterministic & reproducible

Free online PDF compressor that reduces file size by up to 90%.

75/100

7/7 frames

Top 60% of 14,148 measured · #46 of 66 in pdf toolkit

Legit Benchmark — the simple average of 7 measured frames. Frames we could not measure are left out of the average, never counted as zero. Every frame is shown below with its evidence.

Checked 2026-09-28 · scores move as sites change

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To cite this score: legit.show/s/kompres-org/2026-09-28. That address never changes; this page moves with every re-measure.

Legit.Show scored Kompres 75/100 on 2026-09-28, measured across all 7 frames from its public surface. legit.show/s/kompres-org/2026-09-28

Is Kompres production-ready?

Legit.Show scores Kompres 75 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Kompres (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Reliability; its weakest is Security. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

Performance — 64/100
Accessibility — 87/100
Security — 25/100
How this compares across the catalogue: The Web Security Baseline
Privacy — 75/100
How this compares across the catalogue: The Privacy Gap
Reliability — 100/100
Standards — 92/100
Discoverability — 85/100

What we measured

No Content-Security-Policy and no HSTS.
Served over HTTPS with a valid certificate.
Real Lighthouse performance run — 208 ms to first byte.
Returns a proper 404 for unknown routes.
3 of 3 sampled routes reachable.
Has a reachable privacy policy.
Sets cookies / loads scripts with no consent prompt.
Discoverable: structured data, sitemap, OpenGraph image, canonical URL.

Who it's for

Students · Office teams · Freelancers · Business users · Document managers

Pricing

Free

Sources and updates

Description: Taken from kompres.org's own website on 2026-09-28.
Operator: Kompres PDF, as named in kompres.org's terms, privacy page or footer.
Benchmark: Measured by Legit.Show from the live site, the way any visitor sees it — with no access to its code or accounts. Same method for every product, and no AI decides the score. Last checked 2026-09-28.

Put together from public information, without Kompres's involvement. If anything here is wrong, tell us and a person will check it.

Visit Kompres → · Alternatives to Kompres → · How this was measured →