Quick Merge

Merge unlimited CSV, PDF, Excel, JSON, and Text files directly in your browser. Fast, secure, and private.

How It Works
1

Upload & Arrange

Upload multiple files by dragging them or browsing. Supports multiple formats and ZIP archives. Use drag handles to reorder files.

2

Configure Alignment

Select a merge strategy. Smart Union aligns matching column headers, Intersection keeps common fields, Join merges columns matching on a key.

3

Merge Securely

Click merge. Data is streamed in chunks directly onto your local disk. Since processing is 100% client-side, your data remains completely private.

Files Manager 0 files
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Drag & drop your files here

Supports multi-file select and ZIP archives.

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⚙️ Merge Settings CSV Mode

ℹ Smart Union aligns columns across all files regardless of column order. Great for messy data.
Output Settings
ℹ
Streaming Direct-to-Disk Enabled: On desktop browsers, files are merged and written straight to your downloads folder chunk-by-chunk. This uses near-zero browser memory.
Merge Actions
Live Structure Preview Shows first 10 rows
Select files to see column alignments
No preview available