PDF size limits by platform — complete 2026 guide
Comprehensive table of PDF file size limits across 30+ platforms: email, messaging, cloud, official forms. Data verified May 2026.
Last updated: May 2026
Hitting a limit?
Compress your PDF in one click — free, local, no signup
| Platform | PDF limit |
|---|---|
| Gmail | 25 MB |
| Outlook.com / Office 365 | 20 MB |
| Outlook Desktop (Exchange) | 20 MB (default) |
| Yahoo Mail | 25 MB |
| iCloud Mail | 20 MB (send limit) |
| ProtonMail | 25 MB (free), 50 MB (Plus) |
| Tutanota | 25 MB |
| GMX | 50 MB |
| Zoho Mail | 20 MB (free), 25 MB (Mail Premium) |
Messaging
| Platform | PDF limit |
|---|---|
| 2 GB (since 2022) | |
| Signal | 100 MB |
| Telegram | 2 GB (free), 4 GB (Premium) |
| iMessage | ~100 MB theoretical, auto-compresses beyond 5 MB |
| Facebook Messenger | 25 MB |
| Instagram DM | ~100 MB (video) |
| Discord | 25 MB (free), 500 MB (Nitro) |
| Slack | 1 GB per file (free + Pro) |
| Microsoft Teams | 250 MB (chat), 100 GB (channel SharePoint) |
Cloud & Transfer
| Platform | PDF limit |
|---|---|
| Google Drive (upload) | 5 TB per file (Workspace), 750 GB/day |
| Dropbox | 50 GB per file (Plus), 350 GB (Business) |
| OneDrive | 250 GB per file |
| iCloud Drive | 50 GB per file |
| WeTransfer | 2 GB (free), 20 GB (Pro) |
| Smash | Unlimited (free) |
| TransferNow | 5 GB (free), 250 GB (Business) |
Forms & Platforms
| Platform | PDF limit |
|---|---|
| Parcoursup (FR universities) | 2 MB per PDF |
| LinkedIn (CV upload) | 5 MB |
| Indeed (CV upload) | 5 MB |
| USCIS (US Immigration) | 6 MB per file, 30 MB total |
| IRS (US Tax) | 10 MB per file |
| FAFSA | 4 MB per file |
| UCAS (UK universities) | 4 MB per file |
| Common App (US colleges) | 500 KB per essay PDF |
Frequently asked questions
What is the Gmail PDF attachment limit in 2026?+
25 MB per message (including all attachments). Beyond that, Gmail automatically offers to upload to Google Drive and send a link. The recipient receives an email with a Drive link rather than a direct attachment.
Why is Parcoursup limited to only 2 MB per PDF?+
For server bandwidth and storage reasons (1 million applicants × multiple documents). It is one of the strictest limits on the web, which forces nearly all scanned CVs to be compressed before upload.
Does WhatsApp really accept 2 GB per file?+
Yes, since the 2022 increase. The limit went from 100 MB to 2 GB per file for documents (PDF included). One of the most generous limits among messaging apps.
What is the difference between email limit and cloud limit?+
Email limit applies to attachments traveling through SMTP servers — typically 20-25 MB. Cloud limit (Drive, Dropbox, OneDrive) applies to files stored and shared via link — typically 5 GB to 250 GB depending on the service.
How do I know my company's Exchange/Outlook limit?+
Ask your IT admin, or send yourself a test email with a 20 MB attachment. If it arrives, the limit is ≥ 20 MB. Most companies raise their Exchange limit to 35-50 MB, but some maintain 10 MB to reduce server storage.
Why does my 5 MB PDF get rejected by Outlook when the limit is 20 MB?+
Outlook adds about 40% overhead to attachment size due to Base64 encoding (binary → text conversion for SMTP). A 5 MB PDF transmitted weighs about 7 MB in reality. Effective attachment limit is therefore about 13-14 MB for an Outlook showing a 20 MB quota.
Hitting a limit with your PDF?
Up to 90% reduction in seconds, 100% local in your browser.
Compress now →