File Size Limits Cheat Sheet — Email, Cloud, Social Media (2025)
A printable reference of every file size limit you need to know — email providers, cloud storage, social media, messaging apps, and developer platforms. Updated for 2025.
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