Free Tools /Sales
Cold Email Checker
Paste a cold email and its subject line: get a checklist score and a precise fix list for length, spam phrases, merge tags, claims, links and your ask.
- Free, no signup
- Runs in your browser
- Nothing stored
Runs in your browser. Nothing is uploaded or stored.
Checklist score
0 / 100
Who uses it, and for what
Check every new template before the first send.
Give writers one shared checklist instead of subjective reviews.
Catch unfilled {{first_name}} tags and broken subject lines in seconds.
How this tool works
Paste the subject and the email
Everything runs in your browser. Nothing you paste is sent to a server or stored.
20+ checks in one pass
Length, subject line, unfilled merge tags, spam-trigger phrases, unprovable claims, links, number of asks, focus on the reader, sentence length, capitals and exclamation marks, opening clichés and the opt-out line.
Fix list, not a magic number
Each issue comes with the exact words that triggered it and a suggested fix. The score is a checklist score: it counts what the email gets right, it does not predict your reply rate.
Guide
What makes a strong first line?
A specific, checkable fact about the reader: their niche, a page on their site, their city or a recent change. Avoid openers about yourself ("My name is...") and filler ("I hope this email finds you well").
What should the ask be?
One small, easy step: a yes or no question, or a short call. Make it the last line so it is the thing they remember.
Frequently asked questions
How long should a cold email be?
Short enough to read on a phone without scrolling. This checker flags first emails above about 150 words and follow-ups above about 90, and very short emails under 40 words that rarely carry enough context.
Which words trigger spam filters?
No single word sends an email to spam: filters weigh sender reputation, authentication and engagement first. Phrases such as "act now", "risk-free" or "100% guaranteed" still make a message look like marketing to people and filters, which is why the checker lists them.
Does a cold email need an unsubscribe line?
In the US, the CAN-SPAM Act requires commercial emails to offer a way to opt out and to include a valid postal address, and many other countries have stricter rules. A short line such as "Reply no and I will not write again" also keeps your list clean.
Why does the checker count questions?
One clear ask gets a clearer answer. Several questions make the reader work out what you want, so the checker suggests keeping one main ask.
Is my email stored?
No. The checks run entirely in your browser; nothing is uploaded.
Who made this tool?
PURIST, a workflow automation studio. We use the same rules on our own outreach before anything is sent.
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Done for you
Want this running inside your business, automatically?
We build the workflow behind tools like this one, wired to your CRM, inbox and apps, and keep it running. Fixed price, from $390 a month.