Question 1

Is ViewLog safe for sensitive or production logs?

Accepted Answer

Yes. ViewLog runs 100% in your browser and never uploads your logs to any server. The content of your files is parsed locally on your device, so sensitive and production logs never leave your machine. Nothing is sent over the network or stored server-side.

Question 2

Does ViewLog support large log files?

Accepted Answer

Yes. ViewLog handles very large files, tens of megabytes and hundreds of thousands of lines. Parsing covers the first million lines and the interface stays smooth thanks to list virtualization. All processing happens locally in your browser.

Question 3

What log formats does ViewLog support?

Accepted Answer

ViewLog supports plain text logs (.log, .txt) and CSV (.csv). It automatically detects the timestamp, log level (from TRACE to FATAL) and message, and attaches multi-line stack traces to their entry. Application logs, server logs and syslog-style lines are parsed generically, and inline JSON is pretty-printed.

Question 4

Can I use ViewLog without an internet connection?

Accepted Answer

Yes. After a first visit with a connection, your browser keeps the application files, so ViewLog opens and works offline: on a plane or on an isolated machine. Import, search, filters and patterns all behave normally, because the processing was already fully local. ViewLog can also be installed as an app. The very first visit must happen online, and private browsing keeps nothing once the window is closed.

Question 5

Is ViewLog free to use?

Accepted Answer

Yes, ViewLog is completely free. There is no account to create and no server to run, because everything happens in your browser.

Question 6

How does ViewLog protect my data privacy compared to other online log viewers?

Accepted Answer

Most online log viewers upload your files to a remote server to process them. ViewLog is different: it is 100% client-side, so your log content is never uploaded, stored, or transmitted. This privacy-first, zero-server design makes it well suited to GDPR and HIPAA sensitive logs.