---
Source: https://docs.microblink.com/verify/client-side-sdk/verify-sdk
Title: Verify SDK
Description: Official BlinkID Verify SDK for mobile and web document verification
---

# Verify SDK

The Verify SDK helps with capturing high-quality document images that are **suitable for server side verification**.
We call such images **verifiable**.
It provides:

- **Real-time guidance** for proper document positioning
- **Image quality assessment**, and UI feedback
- Extremely **quick capture speed**
- Multiple platform support (**iOS**, **Android**, **Web**)
- Automatic integration with the **verification API**
- Optimal options for **verification** by default (whereas BlinkID needs manual configuration)
- **Guaranteed image compatibility** (an image the SDK deems suitable for verification will be always be fully processed by the API)
- Special **Image compression** compatible with the API, and payload optimization for minimal latency

:::warning[Important]
If you're handling the API calls yourself, **never modify the captured images in any way**.
Prefer using the multipart endpoint (because it has lower latency), but if you must, encoding the images to base64 is ok.

The images are **pre-compressed** to JPEG.
The Verify SDK does this in a special way that ensured compatibility with the API.
When using BlinkID, the images **cannot** be compressed to JPEG.
:::


## Android

View the full Android Verify SDK documentation [here](https://github.com/BlinkID/blinkid-verify-android).

## iOS

View the full iOS Verify SDK documentation [here](https://github.com/BlinkID/blinkid-verify-ios).

## Web

View the full Web Verify SDK documentation on [GitHub](https://github.com/microblink/web-sdks/tree/main/packages/blinkid-verify).
For the complete API reference, see the [Web SDK API reference](/verify-web-sdk/).