Once you reach your plan's diff limit, additional API requests will return an error until your usage resets at the start of your next billing period. You can upgrade your plan at any time to get higher limits.
Diffchecker API
Use the Diffchecker API to compare text, documents, images, and spreadsheets programmatically. A powerful document comparison and file diff API for developers.
Access
Email authentication
API Key authentication
Usage per month
Text diffs
Image diffs
PDF diffs
Excel diffs
Max input size
Text diffs
Image diffs
PDF diffs
Excel diffs
Basic
Free
Access
Usage per month
- 250
- 20
- 20
- 20
Max input size
- 2 MB
- 2 MB
- 2 MB
- 2 MB
Access
Usage per month
- 100 000
- 10 000
- 10 000
- 10 000
Max input size
- 100 MB
- 25 MB
- 25 MB
- 25 MB
Enterprise
Custom
Access
Usage per month
- Custom
- Custom
- Custom
- Custom
Max input size
- Custom
- Custom
- Custom
- Custom
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Frequently Asked Questions
Usage counters reset automatically when your subscription renews. For monthly plans, this happens every month. For yearly plans, usage resets once per year at renewal.
Yearly plans offer a 17% discount compared to paying monthly. Yearly plans also come with 12x the usage limits, which reset once per year instead of monthly.
Paid plans use API key authentication. After purchasing, you'll receive an API key that you include in the X-Api-Key header of your requests. Free tier users authenticate with their email address.
File size limits depend on your plan. The Basic (free) tier supports up to 2 MB per file. The Standard plan supports up to 10 MB. The Business plan supports up to 100 MB for text and 25 MB for images, PDFs, and Excel files.
The API supports text diffs, image diffs, PDF diffs, and Excel diffs. Each diff type has its own usage limits and file size maximums.
You can upgrade your plan at any time. Contact us if you need to make changes to your subscription.
To request a refund, please fill out our contact form within 30 days of your purchase.
Have more questions? Contact us