Free online log viewer and analyzer. Paste or upload log files, filter by level, search keywords, and view highlighted results. All processing runs locally in your browser.
Drag & drop a log file here or click to select
β or paste log content below β
No. Log Viewer is a web-based tool β just open it in your browser and start using it. No downloads, plugins, or extensions required.
Log Viewer has no usage limits β it's free and unlimited. Since processing is done client-side, speed depends on your device. For very large files, we recommend processing in batches for the best experience.
Yes. Log Viewer is fully responsive and works on phones, tablets, and desktops. The interface adapts automatically to your screen size.
No. Log Viewer uses client-side processing β everything runs in your browser. Your data never leaves your device, and the tool works even without an internet connection.
Absolutely. Everything runs locally: log files and other values are processed on your device, never sent to a server. No data is sent to any server, so there's zero risk of data leaks. Your information stays completely under your control.
Yes, Log Viewer is completely free to use. No registration or login required β all features are available immediately.