---
title: "Upload Evidence"
description: "This feature allows you to securely upload files that serve as evidence or supporting documentation within the system. These files are typically associated with specific records, such as Evidence F..."
last_updated: "2026-05-06T07:36:18.453172+00:00"
canonical_url: "https://www.doc0.dev/docs/49c89830-117b-4def-8edc-b5bcc50766e0/guide/section-3/upload-evidence"
---
This feature allows you to securely upload files that serve as evidence or supporting documentation within the system. These files are typically associated with specific records, such as Evidence Forms, to provide necessary context and proof. Once uploaded, these files are stored securely and can be accessed or downloaded as needed.
Uploading evidence ensures that all relevant information is centrally located and easily auditable, helping you maintain comprehensive records for compliance and operational transparency.
### Key Concepts
Before you upload evidence, it's helpful to understand a few key terms:
* **Evidence Forms**: These are structured digital forms used to collect specific information and often require supporting documents or files as evidence. Uploading evidence typically links it to a particular field or submission within an Evidence Form.
* **Base64 Encoding**: For security and transfer efficiency, files are not sent directly. Instead, they must be converted into a special text format called Base64. This process transforms the binary data of your file (like an image or PDF) into a string of characters that can be easily transmitted.
* **MIME Type**: This is a standard way to classify the type of content a file holds (e.g., `application/pdf` for a PDF document, `image/png` for a PNG image, `text/plain` for a plain text file). Providing the correct MIME type helps the system handle your file appropriately.
For security reasons, certain file types that could potentially execute malicious code are blocked from being uploaded. Always ensure your files are safe and do not fall into the blocked categories.
### How to Upload Evidence
To upload a file as evidence, you'll need to prepare the file and provide its details.
### Prepare Your File
First, you need to convert your file into a Base64 encoded string. This is a common process that can be done using various tools or programming libraries.
For example, if you have an image file, you would convert its content into a long string of characters.
### Gather File Information
You will need the following details about your file:
* **File Name**: The original name of your file (e.g., `report.pdf`, `screenshot.png`).
* **File Type (MIME Type)**: The standard identifier for your file's content type (e.g., `application/pdf`, `image/jpeg`).
* **File Data**: The Base64 encoded string of your file's content.
* **Description (Optional)**: A brief explanation of what the file contains or its relevance.
### Submit the Upload
Once you have the necessary information, you can submit the upload request. The system will process your file and return metadata about the newly uploaded evidence.
Here's an example of the information you would provide:
```json
{
"fileName": "meeting-notes-q4.pdf",
"fileType": "application/pdf",
"fileData": "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8/5+hHgAHggJ/PchI7wAAAABJRU5ErkJggg==",
"description": "Meeting notes from Q4 planning session"
}
```
The `fileData` field will contain a much longer Base64 string representing your actual file content. The example above is a very short placeholder.
### File Type Restrictions
To maintain system security, certain file types are not permitted for upload. These are typically executable files or scripts that could pose a risk.
The following MIME types are blocked:
| Category | MIME Types |
| :---------------- | :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------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| **File Name** | `fileName` | string | Required | The name of the file, including its extension (e.g., `document.pdf`). Maximum length is 255 characters.
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