Ready
Link Validation · Merge Tag Detection · Duplicate URL Check

Catch errors before
they reach your list

Paste your email HTML below. SendTest checks every link, detects staging URLs, unresolved merge tags, duplicate CTAs, and missing unsubscribe links — instantly.

¥5.4M
Avg. cost per mistake (300k list)
7
Error types caught automatically
<1s
Time to full report
0
Install required
Email Subject Checks for filename patterns
Production Domain For resolving relative links
Email HTML
0 chars
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SendTest catches structural email errors. It does not verify that URLs lead to the correct destination page. What we check →