Validate emails — RFC 5321 syntax + bulk paste + disposable detection + MX hint.
- Runs locally
- Category Text
- Best for Removing repetitive cleanup work from everyday writing and operations.
Type or paste an email above.
What this tool does
Free in-browser email validator. Paste a single address or a list of thousands — every email is checked against RFC 5321 (local part ≤ 64 chars, full address ≤ 254 chars, LDH domain labels, alphabetic TLD) plus a curated list of 30+ disposable / temp-mail providers (mailinator, 10minutemail, guerrillamail, yopmail, tempmail…). Common typos like `gmial.com` → `gmail.com`, `yhoo.com` → `yahoo.com`, and `hotmial.com` → `hotmail.com` get an auto-suggestion. The batch table shows status + reason per row and exports the valid list as CSV. Everything runs in the tab — paste leaked lists or signup CSVs without anything touching a server.
Tool details
- Input
- Files + Text
- The page exposes text boxes, numeric controls, file pickers, or structured inputs depending on the tool.
- Output
- Live result + Download
- The result area focuses on usable output, with copy, download, or preview actions when supported.
- Privacy
- Browser-side processing
- The main tool logic does not call an external API, so inputs normally stay in the current tab.
- Save / share
- No account required
- Open the page and use it; whether results survive refresh depends on the tool.
- Performance budget
- Initial JS <= 22 KB
- No WASM budget is declared, keeping the tool quick to open on mobile.
- Best fit
- Text · Developer
- Category and role tags drive related tools, internal links, and quick fit checks.
How to use
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1. Input
Paste or drop your content into the tool panel.
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2. Process
Click the button. All processing is local in your browser.
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3. Copy / Download
Copy the result or download to disk in one click.
How Email Validator fits into your work
Use it to clean, compare, reshape, or extract plain text before it goes into a document, CMS, spreadsheet, or prompt.
Text jobs
- Removing repetitive cleanup work from everyday writing and operations.
- Making text easier to compare, paste, publish, or feed into another tool.
- Working with content locally when the text is private or unfinished.
Text checks
- Scan for unintended whitespace, duplicate lines, and lost punctuation.
- For long text, test the first few lines before applying the whole change.
- Copy the final output only after checking the preview.
Good next steps
These links move the current task into a more complete workflow.
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- 3 URL Encoder / Decoder Encode and decode URL-unsafe characters — query strings, path segments, full URLs — instant, browser-only Open
FAQ
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