lens-background

Free CSV File UTF-8 Validator
Easily Check Your CSV Files for Non-ASCII Characters to Ensure UTF-8 Compliance

Getting a "UTF-8 Error" and don't know why? This tool scans your CSV file to identify any special characters that may cause issues with data processing or compatibility across platforms.


No data is stored or sent to a server: All checks are performed locally in your browser.

Instant validation: Upload your CSV file, and we'll quickly scan for any non-UTF-8 characters.

Simple results: Get a clear report on any detected issues, including the exact row and column where special characters are found.

No data is stored or sent to a server.

All checks are performed locally in your browser.

No data is stored or sent to a server.

All checks are performed locally in your browser.

Still having problems? Try OpenRefine.

OpenRefine is a free, open-source tool designed specifically for working with “messy” data. It can help you quickly spot and fix issues in your CSV (extra spaces, inconsistent formatting, duplicate rows, wrong capitalization, etc.), and then export a clean, Snapizzi-ready file. If your spreadsheet program isn’t catching the problem, running your data through OpenRefine is often the fastest way to get things sorted out.