5 MB EML sample
An EML file of exactly 5,242,880 bytes. It is a valid Email message file, generated by this site. Compare its checksum and test it with the parser used by your application. Use it wherever you need a 5 MB sample, test or dummy EML file.
Download
sample-eml-5mb.eml
5 MB5,242,880 bytes
Download 5 MB EMLCreated in your browser in a few seconds, then checked against the SHA-256 checksum. The file is not uploaded anywhere. No sign-up.
- Type
- message/rfc822
- SHA-256
957248eb0a5d8f8154a3bcd2a853bf54c0a6148c727ee0bfa2c5a722ac3df983- Delivery
- Created in your browser from static generator assets (how it works).
What is in this file
A plain-text email message with standard headers and 15,670 paragraphs wrapped at 72 characters. Lines of dashes at the end of the body bring the file to the exact size.
| Paragraphs | 15,670 |
|---|---|
| Content type | text/plain, 7bit |
| Attachments | None |
| Line endings | CRLF (RFC 5322) |
| Encoding | UTF-8 (ASCII characters only) |
How the file begins
The opening lines of sample-eml-5mb.eml, exactly as they appear in the file.
00000000 46 72 6f 6d 3a 20 22 53 61 6d 70 6c 65 54 65 73 |From: "SampleTes|
00000010 74 46 69 6c 65 73 20 53 61 6d 70 6c 65 73 22 20 |tFiles Samples" |
00000020 3c 73 61 6d 70 6c 65 73 40 65 78 61 6d 70 6c 65 |<samples@example|
00000030 2e 63 6f 6d 3e 0d 0a 54 6f 3a 20 22 54 65 73 74 |.com>..To: "Test|Preview
Creates the file in your browser and shows the first 64 KB of it.
Where 5 MB matters
A 5,242,880-byte file: the size of a phone photo and the minimum part size for S3 multipart uploads. These are the default limits a file of this size is useful for testing:
| System | Limit | Note |
|---|---|---|
| PHP | 2 MB per uploaded file by default (upload_max_filesize) | A 5 MB upload fails on an untuned PHP installation. |
| Vercel Functions | 4.5 MB request body | Larger uploads must go directly to object storage. |
| Amazon S3 multipart upload | 5 MiB minimum part size | This file is exactly one minimum part. |
| AWS Lambda | 6 MB synchronous invocation payload | 5 MB of binary data exceeds it once base64-encoded. |
| Browser localStorage | About 5 MB per origin | Storing this file as text fills the quota. |
| Django | 2.5 MB in memory by default | Larger uploads are streamed to a temporary file instead of held in memory. |
Use this file for
- Finding the first upload limit in a new stack
- Testing help-desk and archiving software
- Testing email parsers and import features
Testing notes for EML
- Header values can be folded across lines and encoded with RFC 2047 encoded-words; parsers that read headers line by line get subjects wrong.
- An HTML body is untrusted HTML and needs sanitising before display.
Technical details
| File name | sample-eml-5mb.eml |
|---|---|
| Format | EML (Email message) |
| Extension | .eml |
| MIME type | message/rfc822 |
| Size | 5,242,880 bytes (5 MB) |
| Kind | Text |
| SHA-256 | 957248eb0a5d8f8154a3bcd2a853bf54c0a6148c727ee0bfa2c5a722ac3df983 |
| Created | 2026-10-23 |
| Validation | See the listed size and SHA-256. Small downloads are checked in the browser; verify streamed downloads manually. A hash match does not prove parser compatibility. |
| Preview | Available on this page |
| Source | Generated in your browser by this site's generator; not copied from elsewhere |
| Licence | Free to use, modify and redistribute (terms) |
| Category | Email & Calendar |
Check the stated structure and checksum against your application requirements. As with any download, scan the file with your own security tools before opening it. How files are made and checked
Verify your copy
This file is created in your browser, so it has no direct URL for curl or wget. The generator is designed to produce reproducible bytes. After saving, compare the checksum with the SHA-256 value above.
sha256sum sample-eml-5mb.eml # Linux
shasum -a 256 sample-eml-5mb.eml # macOSOn Windows, run Get-FileHash sample-eml-5mb.eml -Algorithm SHA256 in PowerShell. For scripts and pipelines, save the file once and keep your own copy.
Related files
Questions about this file
- Is this file exactly 5 MB?
- Yes. It is 5,242,880 bytes, which is 5 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 5 MB EML file?
- A plain-text email message with standard headers and 15,670 paragraphs wrapped at 72 characters. Lines of dashes at the end of the body bring the file to the exact size.
- Are the email addresses real?
- No. They use example.com and example.org, which are reserved for documentation and cannot receive mail.