File Size Limits Cheat Sheet — Email, Cloud & Social Media
A printable reference to common file size limits for email providers, cloud storage, social media, messaging apps, and developer platforms. Limits change over time, so verify the provider's current documentation before enforcing one in production.
Email Attachment Limits
| Provider | Max Attachment | Max with Share Link | Notes | |----------|---------------|-------------------|-------| | Gmail | 25 MB | 10 GB (Google Drive) | Auto-converts >25MB to Drive link | | Outlook | 20 MB | 2 GB (OneDrive) | Microsoft 365 allows larger | | Yahoo Mail | 25 MB | N/A | | | Apple Mail (iCloud) | 20 MB | 5 GB (Mail Drop) | Mail Drop expires in 30 days | | ProtonMail | 25 MB | N/A | Encrypted attachments | | Zoho Mail | 20 MB | N/A | | | Amazon SES | 10 MB | N/A | API: 40MB raw message |
Test with our sample files by size — download exact 10MB, 20MB, 25MB files.
Cloud Storage Upload Limits
| Service | Max File Size | Max Upload (API) | Free Tier | |---------|-------------|-----------------|-----------| | AWS S3 | 5 TB | 5 GB single / 5 TB multipart | N/A (pay-per-use) | | Google Cloud Storage | 5 TB | 5 TB (resumable) | N/A | | Azure Blob | 4.75 TB | 5000 MB block | N/A | | Cloudflare R2 | 5 GB | 5 GB (single) / 5 TB (multipart) | 10 GB/month free | | Google Drive | 5 TB | 5 TB per file | 15 GB | | Dropbox | 2 GB (web) | 50 GB (desktop) | 2 GB | | OneDrive | 250 GB | 250 GB | 5 GB | | iCloud Drive | 50 GB | 50 GB | 5 GB |
Test cloud upload limits with our download test files — 1MB to 10GB.
Social Media Upload Limits
Video
| Platform | Max Size | Max Duration | Resolution | Format | |----------|---------|-------------|------------|--------| | YouTube | 256 GB | 12 hours | Up to 8K | MP4, MOV, AVI, WebM | | Instagram Reels | 4 GB | 90 seconds | 1080×1920 | MP4 | | Instagram Feed | 4 GB | 60 minutes | 1080×1080 | MP4 | | TikTok | 4 GB (web) | 10 minutes | 1080×1920 | MP4, MOV | | Twitter/X | 512 MB | 2:20 (free) / 4hr (Premium) | 1920×1200 | MP4 | | Facebook | 10 GB | 240 minutes | 1080p | MP4, MOV | | LinkedIn | 5 GB | 10 minutes | 1080p | MP4 | | Vimeo (free) | 500 MB/week | No limit | 1080p | Most formats |
Images
| Platform | Max Size | Resolution | Format | |----------|---------|------------|--------| | Instagram | 8 MB | 1080×1350 (feed) | JPEG, PNG | | Twitter/X | 5 MB (photo) | 4096×4096 | JPEG, PNG, GIF | | Facebook | 10 MB | 2048×2048 (display) | JPEG, PNG | | LinkedIn | 10 MB | 4000×4000 | JPEG, PNG | | Pinterest | 20 MB | 1000×1500 (ideal) | JPEG, PNG |
Test with sample images — JPG, PNG, WebP in exact sizes.
Messaging App Limits
| App | Max File Size | Max Video | Max Image | Notes | |-----|-------------|-----------|-----------|-------| | WhatsApp | 2 GB | 16 MB (compress) / 2 GB (document) | 16 MB | Document mode bypasses compression | | Telegram | 2 GB | 2 GB | 2 GB | No compression in file mode | | Discord | 25 MB (free) / 500 MB (Nitro) | Same as file | Same as file | | | Slack | 1 GB | 1 GB | 1 GB | Free plan: 5 GB total storage | | iMessage | 100 MB | 100 MB | 100 MB | | | Signal | 100 MB | 100 MB | 100 MB | | | Microsoft Teams | 250 MB | 250 MB | 250 MB | |
Developer Platform Limits
| Platform | Max Upload | Max Request Body | Notes | |----------|-----------|-----------------|-------| | Vercel | 4.5 MB (serverless) | 4.5 MB | Edge: 25 MB | | Netlify | 100 MB (deploy file) | N/A | Total deploy: 15 GB | | AWS Lambda | 6 MB (sync) / 256 KB (event) | N/A | Use S3 for large files | | Cloudflare Workers | 100 MB | 100 MB | | | GitHub | 100 MB (file) | 50 MB (web upload) | LFS: 2 GB | | npm | 200 MB (package) | N/A | | | Docker Hub | 10 GB (layer) | N/A | Uncompressed |
Quick Reference Card
| Size | What fits | |------|----------| | 1 MB | 1 photo (compressed), 1 min MP3 @128k | | 5 MB | 5 photos, short voice memo, 1 page PDF scan | | 10 MB | Email-safe with most providers | | 25 MB | Gmail/Yahoo max, Discord free max | | 50 MB | 1 min video (1080p), large spreadsheet | | 100 MB | 5 min video, small app installer | | 500 MB | 1 hour podcast, Vimeo weekly free limit | | 1 GB | Slack max, 10 min 4K video | | 4 GB | Instagram/TikTok max, 1 hour 1080p video | | 10 GB | Facebook video max, large database backup |
Download exact-size test files: Sample Files · Download Tests