This page provides a complete reference for all file upload limits in ZeroTwo, including size limits, format restrictions, per-plan caps, and tips for working with large files.
Upload Limits
| Limit | Value | Notes |
|---|
| Max files per upload | 10 (Pro+) | Free plan: 1 file per request |
| Max file size (general) | 50 MB | Applies to documents, code, images, audio |
| Max file size (video) | 200 MB | MP4, MOV, WEBM, AVI, MKV |
| Upload timeout | 60 seconds | Large files on slow connections may time out |
| Files Library storage | Per-account | No stated hard limit; subject to fair use |
Per-Plan Upload Limits
The number of files you can attach to a single message depends on your plan.
| Plan | Files per Message |
|---|
| Free | 1 |
| Pro | Up to 10 |
| Pro 2x | Up to 10 |
| Plus Ultra | Up to 10 |
| Business | Up to 10 |
The per-message file limit refers to files attached directly to a single chat message. Files stored in your Files Library can be referenced in any message regardless of this limit.
File Size Limits by Type
| File Category | Max Size | Common Formats |
|---|
| Documents | 50 MB | PDF, DOCX, TXT, XLSX, PPTX, CSV, MD |
| Images | 50 MB | JPG, PNG, WEBP, GIF, SVG |
| Code files | 50 MB | JS, TS, PY, GO, RS, Java, C/C++, HTML, CSS |
| Audio files | 50 MB | MP3, WAV, M4A, OGG, FLAC |
| Video files | 200 MB | MP4, MOV, WEBM, AVI, MKV |
Upload Timeout
Uploads that take longer than 60 seconds are automatically terminated. This primarily affects large files on slow internet connections.
Approximate upload times by file size and connection speed:
| File Size | 10 Mbps connection | 50 Mbps connection |
|---|
| 5 MB | ~4 seconds | ~1 second |
| 25 MB | ~20 seconds | ~4 seconds |
| 50 MB | ~40 seconds | ~8 seconds |
| 100 MB (video) | ~80 seconds* | ~16 seconds |
| 200 MB (video) | ~160 seconds* | ~32 seconds |
Tips for Working with Large Files
PDFs:
- Use a PDF compression tool before uploading (many free tools available online)
- For long PDFs, you can reference specific sections in your prompt to help the AI focus
- Split very large PDFs into chapters or sections if they’re near the 50 MB limit
Images:
- Vision analysis (asking ZeroTwo to describe or analyze an image) does not require high resolution
- Downscale large images to 1920×1080 or smaller — the AI extracts the same information from a smaller file
- Use WEBP format instead of PNG for significantly smaller file sizes with comparable quality
Code files:
- Split large codebases into logical modules before uploading
- Upload only the files most relevant to your question rather than entire repositories
- For large projects, consider using the GitHub connector instead of direct file uploads
Videos:
- Use a video editor to extract only the relevant clip before uploading
- Lower resolution exports (720p instead of 4K) are usually sufficient for AI analysis
- MP4 with H.264 encoding provides the smallest file sizes for given quality
Supported File Types
For the complete list of all accepted file formats and extensions, see Supported File Types.
Common Upload Errors
| Error | Cause | Fix |
|---|
| ”Upload failed — file too large” | Exceeds 50 MB (or 200 MB for video) | Compress or split the file |
| ”Upload failed — unsupported file type” | File extension not supported | Convert to a supported format |
| ”Upload timed out” | Upload exceeded 60 seconds | Faster connection or smaller file |
