Merge CSV Files
Merge multiple CSV files with the same columns into a single CSV.
How it works
Upload your CSV files
Select two or more CSV files that share the same column structure.
Files are combined in upload order
The header from the first file is kept. Data rows from all other files are appended below in the order they were uploaded.
Merged CSV is generated
A single output CSV containing all rows from every uploaded file is produced with one shared header row.
Download the combined file
Download the merged CSV and use it directly in a database import, analysis tool, or reporting pipeline.
Quick start
Start in under 10 seconds: choose file, process, download.
No signup required. Files are automatically cleaned up based on your plan retention settings.
Step 1
Upload
Drag files in or browse from your device.
Step 2
Process
Queue runs the conversion with smart defaults.
Step 3
Download
Get your output instantly when done.
All-time runs
Live traffic
30-day success
Reliable processing
Average speed
Fast avg
Step 1 — Upload a file
Drag a JPG, PNG, or WebP image onto the drop zone below, or click Browse. Drop a PDF onto the upload zone below to get started. Select a file or drag it onto the upload zone below.
Step 2 — Processing in the cloud
Your file is in the queue. This usually takes a few seconds — Pro users get priority processing.
Step 3 — Compare, download, or share
Drag the compare slider to see before/after. Use ← → keyboard arrows for precision. Download when ready. Your result is ready. Download the output or save it to your workspace.
Usage
Today:
Max file size:
Usage unavailable.
PDF workspace
Keyboard: Left/Right to change page, [ or ] to rotate the focused page, +/- to zoom, 0 to reset zoom.
Delete/restore, duplication, and page rotation apply to the reordered PDF output. Bulk rotate uses the marked target pages.
Pages
Input summary
Results
✓ CompleteConversion Summary
Original size
Result size
Compression
Saved ratio:
Tip:
Move the slider to compare the original and optimized images side-by-side. Look at the compression badge for quality metrics.
Original
Result
Saved
Reduction
Optimization Details
Original
Settings
Processing time
Download results
Choose an output format or download everything as a ZIP.
We’re optimizing your image. This usually takes a few seconds.
Run failed
Results
Result statistics
Original size
Result size
Saved
Saved ratio:
We’re cropping your image.
Run failed
Read-only viewer results
Your file was analyzed without conversion. No output file was generated.
File size
MIME
Pages
Sheets
Image dimensions
Workbook tabs
Preview
PDF preview
Use browser PDF controls for zoom, search, and page navigation.
PDF compression summary
Original size
Compressed size
Reduced by
Success! Your PDFs are merged. Success! Your PDF is compressed. Success! Your PDF was split. Success! Your PDF is ready. Success! Your PDF is ready.
Download your output now or save it to your workspace.
CSV processing summary
Input rows
Output rows
Output files
Rows removed
Output size
⚡ Process faster with Pro
Priority queue, bigger uploads, longer retention, and no daily caps.
⚡ Process files faster with Pro
You downloaded this run. Upgrade now for priority queue, batch uploads, and saved history.
Share this result
Help teammates skip manual conversions and reuse this exact output.