Download 5 MB PDF file for testing
Open the single page and check document-upload behavior. The preset is 5 MiB (5,242,880 bytes); choose MB for decimal megabytes.
1 MB = 1,000,000 B · 1 MiB = 1,048,576 B
Advanced: test an upload limit
Enter the byte limit above, then choose one byte below, the exact limit or one byte above. Each choice uses the same base: 5,242,880 B. Generate and download each file to test your endpoint.
Where a 5 MB PDF comes up
- Confirming your Vercel or similar function returns a friendly error instead of a raw 413.
- Testing whether a front end blocks large files before sending them, rather than relying on the server.
- Sizing document uploads for portals that advertise a "5 MB maximum" for applications or CVs.
Limits it lands on
- Vercel caps serverless function request bodies at 4.5 MB and answers larger ones with 413 FUNCTION_PAYLOAD_TOO_LARGE; this file is over that cap.
- Sent through AWS API Gateway to Lambda, base64 encoding turns it into roughly 6.99 million bytes — above Lambda's 6 MB synchronous payload limit.
What is inside the file
The document body is identical to the smaller PDFs; only the hidden stream grows, to 5,242,160 bytes.
File name on download: sample-5mb.pdf, so test logs show the size at a glance.
Questions
Is 5 MB here 5,000,000 bytes?
No — it is 5,242,880 bytes (5 × 1,048,576). If a form says "5 MB" and means decimal megabytes, this file is slightly over.
Can I upload it to Lambda directly?
Not through a synchronous invocation: the 6 MB payload limit applies to the encoded request, and base64 inflates binary bodies by about a third.
Reference and checks
Format reference: PDF 32000-1.
Preset target: 5 MiB (5,242,880 bytes). Verify the downloaded file's byte count.
Generate another size in this format · Technical notes for every format · Guide to testing file upload limits · Data processing and privacy
Related tools: Merge PDF · Compress PDF.
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