Merge LOG Files Online



Free online log merger - combine LOG files in time order

Convert directly in your browser, with no upload waiting time, and no risk of data leaks.

Simply choose your log files and the tool will merge them into one log file for you!

Choose LOG Files to Merge

LOG Files:
(Max 10 files, 100M total.)
(More than 10 files? Big than 100M total?)
or drag & drop log files here
 





How to Merge log (3 Steps)

  1. Choose your log files. Select two or more .log files in the order you want them joined.
  2. Merge. The files are appended one after another into a single log.
  3. Download the merged log. Open the combined file in your log viewer.

Online vs App

Same job, two ways — pick the one that fits your file:

OnlineApp
Free✓Trial
No install✓—
No upload✓✓
Large files / batch✗✓
GUI✓✓
CLI—✓

In short: this page is best for a quick, small file. For large files or batch jobs, use the TextMerger desktop app — it also ships a command line for scripts and scheduled runs.

What to Know About log

  • Add the log files oldest first so the merged timeline stays in order.
  • Existing line breaks and timestamps are preserved exactly.
  • UTF-8 and plain ASCII logs are supported.
  • For multi-gigabyte logs use the offline Text Merger instead of the browser tool.

Frequently Asked Questions

Are the log lines sorted by time?

No, the files are concatenated in the order you add them. Add the oldest file first for a chronological result.

How large can the logs be?

The online merger handles files up to 10 MB each. Text Merger merges much larger log files offline.

Is my log uploaded?

No, the merge is done locally in your browser.

Related Tools

Merge text files | Merge CSV files | Merge JSONL files | Split LOG file | Split text file | Text Merger offline app

Need bigger files or batch conversion?

If this service cannot merge your data correctly, or your files are big than 100M, or more than 10 files at a time, you can merge log files locally by this App: Text Merger, for Windows, Linux, and macOS.

Want to stay in the browser? Subscribe (from $5/month) to raise the online limits.

If you have any question or suggestion, please contact us.