Security

Designed without CSV uploads

Parsing, splitting, merging, conversion, transformation, and aggregation run in your browser. There is no processing server that stores your CSV contents, file names, column names, or values.

Each person's work remains in their own browser. The service does not use a shared server-side workspace from which another user could retrieve your CSV.

Protection and remaining risks

• Local processing reduces the risk of transmitting CSV data over a network, but it is not an unconditional security guarantee.
• Malicious browser extensions, malware, screen sharing, shared devices, and download-folder permissions are outside this site's control.
• Keep the source file, then verify output counts and content before using the result in production work.

Browser and file safety

Use an up-to-date major browser and operating system. For highly confidential data, disable unnecessary extensions and use a device that other people cannot access.

Large files can consume substantial device memory. If a tab stops during processing, the original file is not modified, but unsaved output may be lost.

Reporting a concern

If you find behavior that may be a vulnerability, report the reproduction steps and likely impact to the project maintainer without attaching real personal information or confidential CSV files. Please allow time for a safe review before public disclosure.