Merge TMX files
Combine translation memories from different clients, projects or CAT tools into a single TMX. Duplicates are removed and every unit is copied exactly as it was.
Your files never leave your computer. Merging runs in your browser and nothing is uploaded.
How it works
1. Drop your TMX files
From any CAT tool, in any encoding. They're read in your browser.
2. Choose the options
Remove duplicates, keep the first or the most recent copy, and optionally keep only one language pair.
3. Download one TMX
One clean memory, with every unit's dates, users and properties intact.
Frequently asked questions
Is merging TMX files free?
Yes. No sign-up, no limits beyond 500 MB in total.
Are my memories uploaded?
No. Merging runs in your browser, so the files never reach our server.
Which header does the merged file use?
The first file's. Its source language should match the others; files that differ are listed so you can check them.
Can I merge memories in different encodings?
Yes. UTF-8, UTF-16 (Trados) and Windows-1252 files can be mixed; the merged file is UTF-8.
Guides
- Best memoQ Alternatives in 2026 (Free, Mac and Cloud) — Looking for a memoQ alternative? Trados, Phrase TMS, Wordfast, CafeTran, OmegaT, MateCat and Smartcat compared: who each suits, price model, key difference.
- How to Merge TMX Files (and Split Them), Free — Combine several TMX translation memories into one without duplicates, or split a big TMX by language, year, user or size. Step by step, in your browser.
- How AI and RAG Are Changing the Way Translators Work with Large Translation Memories — Explore how AI-powered semantic search and Retrieval-Augmented Generation (RAG) are transforming how translators work with large TMs and multilingual corpora — making millions of segments searchable by meaning, not just word overlap.
More free tools
- TMX and XLIFF converter — TMX, XLIFF, SDLXLIFF and PO to Excel or CSV, and back.
- TM cleaner — Find and remove duplicates, empty and broken segments in a TMX.
- TMX editor — Edit target segments with memoQ-style tags, delete units and save a TMX.
- Split a TMX file — One TMX per language pair, year, user, client or size.
- Open SDLTM files — Read Trados memories without Trados and save them as TMX, Excel or CSV.
- Translation QA checker — Check numbers, tags, spaces and consistency in bilingual files.
- Invoice generator — Create a PDF invoice with VAT, IRPF and reverse-charge notes. Nothing leaves your browser.
- Word count & quote — Count words by match band against your TM or CAT report, price the job and download the quote PDF.
- Free tools for translators — Small tools for everyday translation work. Free, no sign-up, and files are processed in your browser.