Online Text File Merger Merge TXT, CSV, Markdown (.md), and any other plain text files instantly in your browser — no upload, no waiting.
The ultimate free online text file merger. Easily combine multiple text files (.txt), log files, and CSVs into a single document. Our text merger tool runs securely in your browser, ensuring fast and safe processing without uploading your data to a server. Perfect for merging large text files instantly.
Drag and drop or select the files you want to merge.
Supports .txt, .csv, .log, .tsv, and other plain text formats.
Maximum total file size is 2GB.
If your CSV files have header rows, enable "Remove headers after the second file" to keep only the first file's header.
This prevents duplicate headers from appearing in the merged output.
Confirm the file order, then click the Merge button.
The merged file is generated instantly on your device and downloaded right away.
Free and no registration required
Supports any plain text format — CSV, TXT, LOG, TSV, and more
Maximum total file size: 2GB
All processing runs locally in your browser — files are never sent to a server
Binary formats like PDF, Word, or Excel are not supported
Data analysts combining CSV exports
Developers merging log or config files
Writers putting together Markdown or plain text documents
Anyone who needs to merge .txt, .log, .tsv, or similar files without extra software
