What Are the Image Size Limits for OKX KYC Verification?
OKX KYC verification sets a 2MB file size limit for personal identity documents and a 5MB limit for corporate verification files. Personal ID images must also meet a minimum resolution of 600×800 pixels. Requirements vary across different verification scenarios, which are outlined below.
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Prerequisites: Determine which verification you need
OKX image upload limits depend on the type of verification. Before preparing your materials, confirm which of the following applies to you:
Scenario A – Individual Identity Verification (KYC Level 1): A required step for new users to enable trading. Upload the front and back of your identity document.
Scenario B – Corporate/Institutional Verification: Required when opening a corporate account. Upload company documents.
Scenario C – VIP Membership Application: To apply for trading fee discounts, you need to upload proof of trading volume or asset holdings from other exchanges.
Image size limits differ by scenario, as explained below.
Step 1: Image size limits for individual identity verification
To complete Level 1 verification, individual users must submit photos of a valid identity document. OKX officially requires: the file size must be 2MB or less, and the resolution must be at least 600×800 pixels.
| Item | Specific Requirement |
|---|---|
| File size | ≤ 2MB |
| Resolution | ≥ 600×800 pixels |
| Supported formats | JPG, JPEG, PNG |
| Other requirements | Color original, all four corners visible, no glare or obstructions |
Completion criteria: You have checked the size and resolution of your ID image and confirmed it meets the above standards.
Step 2: Image size limits for corporate verification
Corporate account verification requires uploading company documents such as a business license and account opening permit. OKX's official support center clearly states: uploaded documents must bear the company seal, accepted formats are JPG, JPEG, PNG and PDF, and the file size must not exceed 5MB.
Completion criteria: You have confirmed the corporate file size is within 5MB and the format is one of the four supported types.
Step 3: Image size limits for other scenarios
VIP Membership Application: Upload proof of trading volume or assets from other exchanges. Supports JPG, JPEG, PNG formats. Each file must not exceed 10MB, and you can upload up to 3 files.
Customer Support Communication: When sending images to explain issues, JPG and PNG formats are supported, with a single file limit of 10MB.
Profile Picture Upload: Recommended size is 400×400 pixels, and the file size must not exceed 2MB.
Completion criteria: Based on the specific scenario, you have confirmed the image size meets the corresponding limit.
Step 4: How to handle oversized images
If your ID photo exceeds 2MB, use the following compression methods:
iOS Users:
After taking a photo of your ID with an iPhone, the system may save it as HEIC format.
In the Photos album, select the image, tap Share → Save as JPEG to reduce file size.
Alternatively, choose the "High Efficiency" format when shooting, which produces smaller files.
Android Users:
Set photo quality to "Standard" or "Medium" in the camera settings.
Use the phone's built-in photo editing tool to adjust image dimensions.
You can also send the photo to yourself via WeChat and select the "Compress" option.
Completion criteria: The image has been compressed to 2MB or less while still remaining clearly legible.
Step 5: Submitting images in the App
For individual verification on OKX, you must take photos of your ID in real time using the App. You cannot upload existing photos from your album.
Open the OKX App and go to User Center → Identity Verification.
Follow the system prompts to capture the front and back of your ID in real time.
The system will automatically check image quality and only allow submission once requirements are met.
Completion criteria: The image has been captured and successfully submitted, and the page shows it is under review.
Common reasons for rejection
File size exceeds limit: For individual verification, images over 2MB will be rejected outright. Corporate verification files over 5MB cannot be submitted.
Insufficient resolution: Images smaller than 600×800 pixels result in blurry text and will be declined during review.
Unsupported format: Attempts to upload BMP, GIF, WebP, or other unsupported formats will be rejected.
Document is not the original: Screenshots, photocopies, or scans of copies are not accepted.
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Risk reminders
Real-time capture is required for individual verification: OKX does not permit uploading pre-existing photos from your album. This is to prevent the use of fake or edited ID images.
Multiple failed submissions may trigger risk control: Repeatedly uploading non-compliant images could temporarily lock your verification.
After confirming your image size meets the specific verification type's requirements, complete the real-time capture in the App and submit. Standard verification review typically takes from a few minutes up to 24 hours. Keep an eye on in-app notifications and your registered email. If your image is rejected during review, the system will provide a specific reason. Follow the instructions to adjust image size or clarity, then re-capture and upload.
