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Free outbound tool

Free Email Spam Checker

Review email copy with highlighted wording, link and personalization notes. Free browser-based checks; no spam probability or inbox placement guarantee.

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Email spam checker

Review plain-text email with highlighted copy notes, unresolved tokens and practical next steps.

Review English plain-text copy for clarity, pressure and unfinished details. These are transparent editorial heuristics, not mailbox-provider rules. Your text is analyzed in this browser; this checker does not upload or save it.

Up to 300 subject characters and 20,000 body characters. HTML source, binary text and empty bodies are rejected. No silent truncation.

Add your copy, then select Review copy. No analysis yet.

Before sending

Manually confirm that the subject is truthful, claims have evidence, the recipient has a reason to hear from you, and the sender identity and opt-out are clear. A reply-based opt-out does not implement one-click unsubscribe headers.

Need a clearer opener? Use the email subject line generator, then review your edited draft here.

Copy cannot verify authentication. Inspect published records with the SPF record checker and DMARC checker. Use the email deliverability stack guide to plan the separate delivery checks.

Primary guidance, checked August 31, 2026: Google email sender guidelines and Yahoo sender best practices. These sources do not validate a universal forbidden-word list.

How to get more from this tool

What this email spam checker actually checks

Paste the visible English message text, optionally add a subject, and select Review copy. Review notes mark urgency phrases, specific outcome promises, vague link labels, unfilled merge tokens, repeated punctuation, runs of capitals, ambiguous URLs and reply-style subjects. Counts describe your input; they are not mailbox-provider limits.

Read the context before changing a phrase

A factual free trial, cash-flow discussion or SPF acronym is not automatically a problem. The checker uses phrase boundaries and adds context notes for some quotations and negations. It cannot understand every sentence or verify claims. For example, replace ‘Act now’ with a real deadline and reason only when those facts are true.

Copy review is only one part of delivery

Google and Yahoo guidance covers authentication, accurate messages, wanted mail and unsubscribe support. This tool does not inspect DNS, headers, sender reputation, list consent, attachments or actual inbox placement. Keep necessary opt-out links, check a rendered recipient sample, and monitor delivery and complaints separately.

Frequently asked questions

Does this calculate a spam score?

No. It returns transparent editorial review notes with exact text highlights. A numeric probability would imply a mailbox-provider model or measured placement test that this tool does not perform.

Does a flagged word mean my email will land in spam?

No. The notes prompt human review, not automatic deletion. Ordinary free-trial descriptions, quotations, genuine deadlines and acronyms can be appropriate. No listed patterns found is not a deliverability pass.

Is there a safe number of links or words?

There is no universal count that guarantees placement. Make each link useful and its destination clear. Keep necessary unsubscribe and help links. Use enough words to explain why the message is relevant without padding it to a score.

Is my message uploaded, and can I paste HTML?

The checker analyzes text locally in your browser without saving or uploading the input. Paste the visible plain-text content; HTML source is rejected rather than scored misleadingly. Copy review notes exports advice and counts, not the pasted message. English rules can miss issues in other languages.

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