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File Upload Overview

ZeroTwo supports uploading various file types directly into your conversations. AI can read, analyze, and work with your files to provide contextual assistance.
Files are processed securely and only used within your conversation context. They are not used to train AI models.

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Supported File Types

ZeroTwo supports a wide range of file formats for different use cases.
Text Documents:
  • .txt - Plain text files
  • .md / .mdx - Markdown documents
  • .pdf - PDF documents
  • .doc / .docx - Microsoft Word
  • .rtf - Rich text format
Spreadsheets:
  • .csv - Comma-separated values
  • .xlsx / .xls - Microsoft Excel
  • .tsv - Tab-separated values
Presentations:
  • .ppt / .pptx - Microsoft PowerPoint

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Uploading Files

There are multiple ways to add files to your conversation.
1

Drag and drop

Drag files directly from your file manager into the chat input area.
You can drag multiple files at once to upload them together.
2

Click to upload

Click the 📎 Attach button in the chat input, then select files from your file picker.Keyboard shortcut: Cmd/Ctrl + U
3

Paste from clipboard

Copy an image to your clipboard and paste it directly into the chat input.Keyboard shortcut: Cmd/Ctrl + V
This works great for screenshots! Use your system’s screenshot tool, then paste directly.

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File Size Limits

Free Plan

  • Max file size: 25 MB
  • Max files per message: 10 files
  • Total upload limit: 1 GB per month

Pro Plan

  • Max file size: 100 MB
  • Max files per message: 20 files
  • Total upload limit: 10 GB per month

Team Plan

  • Max file size: 200 MB
  • Max files per message: 50 files
  • Total upload limit: Unlimited

Enterprise Plan

  • Max file size: 500 MB
  • Max files per message: Unlimited
  • Total upload limit: Unlimited
Files larger than the limit will be rejected with an error message. Consider compressing large files or splitting them into smaller parts.

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Working with Images

AI can analyze and understand images using vision-capable models.

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Image Analysis Capabilities

What AI can do with images:
  • Describe scenes, objects, and people
  • Identify logos, brands, and text
  • Recognize patterns and designs
  • Detect colors and composition
Example prompt:
What objects are in this image?
  • Read text from images and screenshots
  • Extract data from forms and documents
  • Parse handwritten notes (with varying accuracy)
  • Read text from photos of signs, menus, etc.
Example prompt:
Extract all text from this image and format it as a table
  • Interpret flowcharts and diagrams
  • Read and explain data from charts
  • Understand technical drawings
  • Analyze architecture and design
Example prompt:
Explain what this diagram shows and describe the workflow
  • Convert code screenshots to text
  • Debug code from error screenshots
  • Explain code shown in images
  • Recreate UI from mockups
Example prompt:
Convert this code screenshot to editable text and fix any errors
  • Find differences between images
  • Compare versions of designs
  • Identify changes over time
  • Match similar images
Example prompt:
What are the differences between these two images?
Upload multiple images in one message to compare them.

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Selecting Vision Models

Not all models support image analysis. Use these vision-capable models:

GPT-4o

Fast, accurate vision with strong OCR

Claude 3.5 Sonnet

Excellent detail analysis and reasoning

Gemini 2.0 Flash

Fast vision with good accuracy

Gemini 1.5 Pro

Deep analysis for complex images
Switch to a vision-capable model using the model selector before uploading images for analysis.

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Working with Documents

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Reading Documents

AI can read and analyze document content: Document capabilities:
  • Extract key information and summaries
  • Answer questions about document content
  • Find specific information
  • Compare multiple documents
  • Generate reports from data
Example prompts: 
Summarize the main points from this PDF

What are the key findings in this research paper?

Extract all email addresses and phone numbers from this document

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Code Files

Upload code files for analysis, debugging, and improvements: Code file capabilities:
  • Code review and suggestions
  • Bug detection and fixes
  • Documentation generation
  • Code refactoring
  • Adding comments and explanations
  • Converting between languages
Example prompts: 
Review this code and suggest improvements

Add comprehensive comments to this Python file

Find potential security issues in this code
Upload multiple related files (like a full project) to get context-aware suggestions.

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Spreadsheets and Data

Upload CSV, Excel, and data files for analysis: Data capabilities:
  • Statistical analysis
  • Data visualization recommendations
  • Finding patterns and trends
  • Data cleaning and formatting
  • Creating summaries and reports
  • Answering questions about the data
Example prompts: 
Analyze this sales data and identify trends

Create a Python script to visualize this CSV data

Find outliers in this dataset

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Managing Uploaded Files

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Viewing Attached Files

Files attached to messages appear as cards in the chat: File card information:
  • 📎 File icon and name
  • 📊 File size
  • 🗑️ Remove button (before sending)
After sending a message, files become part of that message and cannot be individually removed. You can delete the entire message if needed.

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File Context

Files remain in context for the current conversation: Context behavior:
  • Files are available for reference throughout the chat
  • AI can refer back to previously uploaded files
  • File content is included in the conversation context
  • Large files may affect response time due to processing
Very large files or many files may consume significant context. For long conversations, consider starting a new chat if performance degrades.

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Files Page

Access all your uploaded files from the Files page in the sidebar.

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File Management Features

Files page capabilities:
  • 📁 View all uploaded files
  • 🔍 Search files by name or type
  • 🗂️ Filter by file type
  • 📅 Sort by upload date
  • 🔗 See which conversations used each file
  • 🗑️ Delete files you no longer need
1

Open Files page

Click Files in the sidebar navigation
2

Browse or search

Scroll through your files or use the search bar to find specific files
3

View details

Click a file to see:
  • File preview (for supported types)
  • Upload date and size
  • Conversations where it was used
  • Download option
4

Manage files

  • Click Download to save a copy
  • Click Delete to remove the file
  • Click a conversation link to jump to where the file was used

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Best Practices

For better performance:
  • Compress images before uploading
  • Use PDF instead of large Word documents
  • Split very large files into smaller parts
  • Remove unnecessary data from spreadsheets
Tools to compress:
  • Images: Use WebP format or reduce resolution
  • PDFs: Use PDF compression tools
  • Archives: Use maximum compression settings
Help AI understand your files:
  • Explain what the file contains
  • Specify what you want to know
  • Mention important sections or data
  • Clarify any unusual formatting
Good example:
I've uploaded a sales report from Q3. Can you analyze the revenue trends 
in the "Monthly Sales" tab and compare them to the targets in column F?
Poor example:
What does this say?
Choose the right model:
  • Images: Use vision models (GPT-4o, Claude 3.5, Gemini)
  • Code: Use code-specialized models (GPT-4, Claude 3.5)
  • Large documents: Use models with large context windows
  • Data analysis: Models good at reasoning (o1, Claude 3.5)
See Models & Providers for detailed model capabilities.
Protect sensitive information:
  • Don’t upload files with passwords or API keys
  • Redact personal information from documents
  • Be cautious with confidential business data
  • Review files before uploading
Remember:
  • Files are encrypted in transit and at rest
  • Files are not used to train AI models
  • You can delete files anytime from the Files page
  • Enterprise plans offer additional security controls

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File Upload Troubleshooting

Possible causes:
  • File exceeds size limit for your plan
  • Network connection issues
  • Unsupported file type
  • Server temporarily unavailable
Solutions:
  1. Check file size against your plan limits
  2. Verify file type is supported
  3. Try uploading again
  4. Compress the file if too large
  5. Check your internet connection
Check these items:
  • ✅ Using a vision-capable model
  • ✅ Image format is supported
  • ✅ Image is not corrupted
  • ✅ Asked specific questions about the image
Switch to a vision model:
  1. Click model selector in the header
  2. Choose GPT-4o, Claude 3.5, or Gemini
  3. Upload image again
  4. Ask your question
Improve AI understanding:
  • Provide more context about the file
  • Specify what you’re looking for
  • Ask more specific questions
  • Break complex requests into steps
  • Mention file structure or format
Example:
This CSV has sales data. Column A is dates, Column B is revenue. 
What was the average revenue in March?
Troubleshooting steps:
  1. Refresh the page
  2. Check if upload completed successfully
  3. Look for error messages during upload
  4. Visit the Files page to see all uploads
  5. Clear browser cache if files don’t appear

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Examples

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Document Analysis

I've uploaded our quarterly report. Please:
1. Summarize the key financial metrics
2. Identify the top 3 growth areas
3. Note any concerning trends

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Code Review

Review this React component I've uploaded and suggest:
- Performance optimizations
- Better error handling
- Accessibility improvements
- Code style issues

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Image to Code

I've attached a screenshot of a UI design. Can you create the HTML 
and CSS to recreate this layout? Use flexbox for the main layout.

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Data Visualization

Analyze this sales data CSV and:
1. Calculate monthly growth rates
2. Identify the best-performing products
3. Create a Python script with matplotlib to visualize the trends

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Multi-file Project

I've uploaded 5 files from my Node.js project. Please review the 
architecture and suggest how to better organize the code for scalability.

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Next Steps

Edit & Regenerate

Learn to refine AI responses

Custom Instructions

Set default file handling preferences

Canvas

Create and edit documents collaboratively

Code Interpreter

Execute code and analyze data interactively
Upload files to give AI the context it needs to provide accurate, relevant assistance!