The fastest, most accurate proxy tester ever built. Test millions of proxies in seconds — and see exactly how good each one is.

Made by HeroProxies.com — the most cost-effective, high-quality wholesale proxies on the market. Try them out today!

Most proxy "checkers" tell you one thing: alive or dead. That's not enough. A proxy that connects can still be slow, blocked by your target site, sitting on the wrong continent, or flagged as a datacenter IP the moment it touches a real website.

Hero Proxy Tester answers the questions that actually matter:

• Does it work? — tested against a real site with a real browser fingerprint, so you get the same answer the site would give.
• How fast is it — for your site? — every proxy is timed end to end and ranked, so you can pull the fastest ones for production.
• What is it? — ASN, network operator, connection type (cellular, datacenter, corporate, cable/DSL, satellite), and city/region for every working proxy.
• Where are the bottlenecks? — the timing is broken into four phases so you can see why a proxy is slow, not just that it is.

It runs as a native desktop app on Windows and macOS, and is engineered to push enormous proxy lists through in a single run.

Massive engine with bounded concurrency and maximum tuning. Point it at a list with hundreds of thousands of lines and watch the dashboard fill in live.

Authentic TLS + HTTP/2 fingerprint (real cipher suites, extension ordering, HTTP/2 settings, GREASE) plus live, rotating Chrome user-agents and client-hint headers (sec-ch-ua, platform, mobile). Sites can't tell the test apart from a real browser — so a proxy that looks working here actually works in the wild. No false "working" results from sites that quietly block bots.

For every proxy, pull detailed intelligence:

• ASN + network operator (e.g. AS7922 Comcast Cable)
• Connection type — cellular, cable/DSL, corporate, datacenter, satellite, dialup
• City / region (subdivision) location
• CGNAT detection — flags carrier-grade NAT ranges
• Egress location — which edge/datacenter actually served the request (where your proxy really exits the network)

Every request is timed across the four things that happen on every proxied request:

1. Reaching the proxy — how far you are from the proxy (your hop to it).
2. Proxy → website — how far the proxy is from your target site (also how long it takes to authenticate).
3. Time to first reply — how long the site takes to start responding.
4. Download time — how long it takes to actually pull the data down.

Each phase gets its own live histogram, so a slow proxy tells you which leg is the problem. Hover over the graph for a thorough explanation.

Results are written to a timestamped results/ folder as you go — no waiting for the run to finish:

• Sorted by HTTP status code (200/, 403/, …), each with an all.txt
• Bucketed by speed — 100ms.txt, 200ms.txt, … 4000ms.txt — so you can grab "all proxies under 200ms to my site" instantly
• failed.txt for everything that didn't pass
• Deep-inspect CSVs with full per-proxy data, plus pre-filtered lists by connection type: cellular, corporate, cable-dsl, satellite, and cgnat

Grab a prebuilt app from the Releases page:

No install, no dependencies. Download, run, drop in your proxy list.

macOS: the app is unsigned, so the first launch may need System Settings → Privacy & Security → Open Anyway, or run xattr -dr com.apple.quarantine "Heroproxies.com Tester.app" once.

Windows: on first run the app offers a one-time TCP tuning step so it can hold huge numbers of concurrent connections. It's optional — skip it and the tester still works.

One proxy per line. Blank lines are ignored.

host:port
host:port:username:password

Both HTTP and HTTPS proxies are supported (tested via HTTP CONNECT tunneling). Authenticated proxies use Basic auth automatically.

   You ──①──▶ Proxy ──②──▶ Website ──③──▶ (first byte) ──④──▶ (full download)
        reach        proxy→site      time to            download
        the proxy                    first reply         time

A great proxy is fast on all four. The dashboard shows you, at a glance, which proxies are — and which ones to throw away.

HeroProxies.com provides high-quality wholesale proxies at the most competitive prices around. This tester is the same tooling we use internally to vet proxy quality — now public so you can verify exactly what you're getting, from anyone.

_{Built with Rust 🦀 · heroproxies.com}