Is Web4 Browser secure?

Legit.Show measured Web4 Browser's Security frame at 80/100. Security headers present: HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy. Served over HTTPS with a valid certificate.

How does Legit.Show measure Web4 Browser?

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.

Developer Tools

Web4 Browser

Last updated 2026-07-09 · benchmark measured 2026-09-26 — deterministic & reproducible

Web4 Browser is a fingerprint browser for managing multiple isolated browser profiles.

78/100

7/7 frames

Top 51% of 14,148 measured · #2 of 5 in anti-detect browser

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 2026-09-26 · scores move as sites change

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To cite this score: legit.show/s/web4browser-io/2026-09-26. That address never changes; this page moves with every re-measure.

Legit.Show scored Web4 Browser 78/100 on 2026-09-26, measured across all 7 frames from its public surface. legit.show/s/web4browser-io/2026-09-26

Is Web4 Browser production-ready?

Legit.Show scores Web4 Browser 78 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Web4 Browser (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Reliability; its weakest is Privacy. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

Performance — 80/100
Accessibility — 97/100
Security — 80/100
How this compares across the catalogue: The Web Security Baseline
Privacy — 0/100
How this compares across the catalogue: The Privacy Gap
Reliability — 100/100
Standards — 86/100
Discoverability — 100/100

What we measured

Security headers present: HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy.
No Content-Security-Policy.
Served over HTTPS with a valid certificate.
Real Lighthouse performance run — 187 ms to first byte.
Returns a proper 404 for unknown routes.
3 of 3 sampled routes reachable.
No privacy policy found.
Sets cookies / loads scripts with no consent prompt.

Who built it

product account @web4_browser

Who it's for

Cross-border e-commerce teams · Advertising and social media managers · Automated testing teams · Data research teams · Multi-account managers

Pricing

Free plan (3 environments); Starter $9/mo (15 environments); Small Team $19/mo (55 environments); Popular $39/mo (125 environments); Scale Team $69/mo (250 environments); Custom enterprise pricing

Sources and updates

Description: Taken from web4browser.io's own website on 2026-07-09.
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 2026-09-26.

Put together from public information, without Web4 Browser's involvement. If anything here is wrong, tell us and a person will check it.

Visit Web4 Browser → · Alternatives to Web4 Browser → · How this was measured →