ERR_TOO_MANY_REDIRECTS — Redirect Loop Fix 2026

Enterno.io Editorial Team

ERR_TOO_MANY_REDIRECTS: Fixing the Loop

By Anatoly Oshmanovsky · Updated Apr 17, 2026

Key idea:

ERR_TOO_MANY_REDIRECTS (Chrome) / "Too many redirects" (Firefox) — browser stopped following redirects after 10+ hops. Causes: server block A redirects to HTTPS, server block B (HTTPS) redirects back to HTTP due to wrong detection. Or WordPress + Cloudflare Flexible SSL. Fix: find loop origin via curl -ILk.

This error blocks HTTPS access. Below: causes, fixes, working config, FAQ.

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Common Causes

HTTP → HTTPS → HTTP loop (CDN treats connection as HTTP)
Cloudflare Flexible SSL (origin HTTP, edge HTTPS) + HTTPS redirect in WordPress
WordPress/Bitrix: siteurl vs home mismatch — auto-redirect
www → non-www in rule A, non-www → www in rule B
HSTS client cache + stale reverse-direction redirect rule

Step-by-Step Fix

In shell: curl -ILk https://example.com — see chain and loop point
Cloudflare: switch SSL/TLS encryption mode to Full (not Flexible)
WordPress: check wp_options → siteurl + home — must match
Clear HSTS cache: chrome://net-internals/#hsts → Delete domain
Bitrix: settings.php → "s1" → "server_name" — single canonical domain

Check SSL Certificate →

Related SSL Errors

CertificateExpiry, issuer, domains (SAN)

ChainIntermediate and root CA validation

TLS ProtocolTLS version and cipher suite

VulnerabilitiesHeartbleed, POODLE, weak ciphers

Why teams trust us

TLS 1.3

supported

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How it works

Enter domain

TLS chain verified

Expiry date & vulnerabilities

What Does the SSL Check Cover?

SSL/TLS is the encryption protocol that protects data between the browser and server. Our tool analyzes the certificate, chain of trust, TLS version, and knownvulnerabilities.

Certificate Details

Issuer, validity period, signature algorithm, covered domains (SAN), and validation type (DV/OV/EV).

Chain of Trust

Full chain verification: from leaf certificate through intermediates to root CA.

TLS Analysis

Protocol version (TLS 1.2/1.3), cipher suites, Perfect Forward Secrecy (PFS) support.

Expiry Alerts

Set up a monitor — get Telegram and email alerts 30/14/7 days before expiration.

DV vs OV vs EV Certificates

DV (Domain Validation)

Confirms domain ownership only
Issued in minutes automatically
Free via Let's Encrypt
Suitable for most websites
Most common certificate type

OV / EV

Organization (OV) or Extended Validation (EV)
Issued in 1-5 business days
Costs $50 to $500/year
For finance, e-commerce, government sites
Increases user trust

Who uses this

DevOps

SSL certificate monitoring

Security

TLS config audit

SEO

HTTPS as ranking factor

E-commerce

customer trust

Common Mistakes

❌

Expired certificateBrowsers block sites with expired SSL. Set up auto-renewal or monitoring.

❌

Incomplete certificate chainWithout intermediate CA, some browsers and bots cannot verify the certificate.

❌

Mixed content on HTTPS siteHTTP resources on an HTTPS page — the browser lock icon disappears, reducing trust.

❌

Using TLS 1.0/1.1Legacy TLS versions have known vulnerabilities. Use TLS 1.2+ or 1.3.

❌

Domain mismatch in certificateThe certificate must cover all site domains, including www and subdomains.

Best Practices

✓

Set up auto-renewalLet's Encrypt + certbot with cron — certificate renews automatically every 60-90 days.

✓

Enable HSTSStrict-Transport-Security header forces browsers to always use HTTPS.

✓

Use TLS 1.3TLS 1.3 is faster (1-RTT handshake) and safer — legacy ciphers removed.

✓

Monitor expiration datesCreate a monitor on Enterno.io — get notified well before expiration.

✓

Verify chain after renewalAfter certificate renewal, confirm that intermediate certificates are installed.

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SSL certificate monitoring, check history and alerts 30 days before expiry.

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How-to

Glossary

Research

TLS Cipher Suites 2026: Distribution Report

Errors

Alternatives

Frequently Asked Questions

What is the redirect limit?

Chrome: 20. Firefox: 20. Then block. Curl default: 50.

How do I inspect my chain?

<a href="/en/redirects">Enterno Redirects Checker</a> shows the chain + codes + timing. Or <code>curl -IL -w "redirects: %{num_redirects}\n" https://example.com</code>.

Cloudflare Flexible vs Full?

Flexible: Edge↔User = HTTPS, Origin↔Edge = HTTP. Flexible + HTTPS redirect in PHP = loop. Full: both HTTPS — no loop.

Loop after HSTS preload?

If yes, the domain is HTTPS-only forever. HTTP redirect won't help. Fix only on the HTTPS side with the right target.