Mergely Alternative – Free Online Merge Tool

What is Mergely?

Mergely is an open-source JavaScript library that provides an interactive diff and merge view for web applications. It is designed for developers who want to embed a diff viewer inside their own product. Mergely itself is a library, not a ready-to-use end-user tool — you need to host it, wire up the UI, and deploy it yourself.

Why Look for a Mergely Alternative?

• You are not a developer — you just want to compare two files right now, not embed a library.
• No hosting — Diff Suite is a hosted, ready-to-use page. You do not need a server or a build step.
• Extra features built in — file upload, edit menu (sort, deduplicate, trim), undo/redo, switch panes. Mergely gives you the diff view; you build the rest.
• Mobile-friendly — Diff Suite works on phones and tablets, not just desktop browsers.

How Diff Suite Compares to Mergely

Feature	Mergely	Diff Suite (this page)
Type	JavaScript library	Ready-to-use tool
Setup needed	Yes (host, wire UI, deploy)	No (open and use)
Side-by-side diff	Yes	Yes
Visual merge arrows	Yes	Yes
Open local files	Build it yourself	Built in
Edit menu (sort, dedupe, trim)	Build it yourself	Built in
Undo / redo	Build it yourself	Built in
Embeddable in your app	Yes (that is its purpose)	No
Cost	Free (open source)	Free

Use Mergely when you are building your own product and want to embed a diff view. Use Diff Suite when you just need to compare and merge two files right now.

How to Use Diff Suite as a Mergely Alternative

1. Click "Open File" in the left pane and select your first file. Do the same in the right pane for the second file. Or paste text directly.
2. Diff Suite shows every added, removed, and modified line side by side.
3. Use the red and green merge arrows to move changes between the two panes, then copy the result.

Everything runs locally in your browser. Your files are never uploaded.

Frequently Asked Questions

Is Diff Suite built on Mergely?

No. Diff Suite is an independent diff and merge tool. It provides a similar side-by-side view and visual merge arrows, but it is a complete end-user tool, not a JavaScript library.

Can I embed Diff Suite in my own application?

Diff Suite is a hosted tool, not an embeddable library. If you need to embed a diff view inside your own product, Mergely or jsdiff are the right choices. If you just need to compare two files now, use Diff Suite.

Does Diff Suite have all the Mergely features?

For end-user text comparison, yes — side-by-side diff, visual merge arrows, file upload, edit menu, undo/redo. Diff Suite does not expose a programmatic API or support embedding.

Is Diff Suite free?

Yes, 100% free with no sign-up and no usage limits. There is also a Plus version with find/replace and copy buttons, also free.

Is my text uploaded to a server?

No. The diff and merge logic runs entirely in your browser. Your files never leave your device.

Related Tools

• Text Compare & Merge Online — the main Diff Suite tool page.
• Compare Two Text Files Online — focused page for the "compare two text files" query.
• WinMerge Online Alternative — run a WinMerge-style diff in your browser.
• Text Compare Plus — same tool plus find/replace and copy buttons.