Our Mission
Amazon Listing Byte Checker was created to help Amazon sellers avoid rejected listings due to byte limit violations. We believe every seller deserves a free, reliable tool that works offline and respects their privacy.
What We Do
Our tool counts UTF-8 bytes exactly like Amazon does, detects invisible characters that can cause listing rejection, and provides real-time warnings before you submit. We support 6 Amazon marketplaces: US, UK, DE, JP, CA, AU.
Privacy First
All calculations happen in your browser. No data is uploaded to any server. We don't store your listing content. Your text never leaves your device.
Get in Touch
Contact us with any questions or feedback.