YouMonit YouMonit.com BETA

Free network tools

Free, no-signup diagnostics for IPs, domains, DNS, TLS and email. Run a single check or batch up to 100 targets at once — handy when you're chasing a flaky record at 3 AM or verifying a fresh certificate.

1
Pick a tool & enter targets
One target, or paste up to 100 for a batch check.
2
Confirm
A quick confirmation step keeps automated bots out.
3
Read the results
Every column is explained right under the table.

Domain and IP bulk lookup tool

GeoIP, ISP, organisation, ASN — for IPs and domains. Bulk up to 100.
Free Up to 100 at once

WHOIS Lookup

Domain registration, registrar, creation and expiry dates. Bulk up to 100.
Free Up to 100 at once

DNS Records

All key DNS records — A, AAAA, MX, NS, TXT, SOA — in one lookup. Bulk up to 100.
Free Up to 100 at once

DNS Detection

Identify the DNS provider behind a domain — Cloudflare, Route 53, Azure DNS and dozens more. Bulk up to 100.
Free Up to 100 at once

Blacklist Checker

Is your IP or domain on a spam DNS blacklist? Bulk up to 100.
Free Up to 100 at once

SSL/TLS Checker

TLS certificate issuer, validity window and days until expiry. Bulk up to 100.
Free Up to 100 at once

HTTP Headers

Inspect the raw HTTP response headers any URL returns. Bulk up to 100.
Free Up to 100 at once

TCP Ping

TCP port reachability and round-trip latency for any host. Bulk up to 100.
Free Up to 100 at once

Email Deliverability

MX, SPF and DMARC sanity check for any sending domain. Bulk up to 100.
Free Up to 100 at once

Web Speed Test

Time to first byte, total load time and page weight. Bulk up to 100.
Free Up to 100 at once

Browser Screenshots ↗ external

Capture rendered page screenshots across desktop, tablet and mobile. Sub-5-second captures, REST API.

Image Converter

Convert images between JPG, PNG, WebP, AVIF, GIF and SVG — up to 20 files per batch with ZIP download.
Free Up to 100 at once

HTTP error test pages

Every common HTTP error code with a live endpoint that actually returns it — perfect for testing monitoring, alerting and error-page handling.
Free Up to 100 at once
Every tool is free and needs no signup. Need this watched around the clock? See YouMonit monitoring plans.