Email attachment size budget
Estimate how selected attachments may grow after Base64 and MIME packaging before sending an email.
Up to 100 files and 100 MB total. Only names, types and sizes are read locally.
A conservative estimate
Base64 expands binary data by roughly one third. The estimate also adds fixed per-file MIME and message overhead, then compares the result with common 10, 20 and 25 MB limits.
Metadata only
The tool reads file name, type and byte size only. It does not read file contents, upload files, store selections or share them with analytics.
Frequently asked questions
Does this tool send my input to a server?
No. The tool runs in this browser after you choose to use it. Your pasted content or generated result is not added to URLs, storage, analytics or server requests.
Does a clean result guarantee that an email or account is safe?
No. These tools explain technical clues and reduce routine risk, but they cannot replace your judgment, malware protection, account security controls or advice from a qualified security professional.
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