Compare CSV & Excel Files
Find exactly what changed between two CSV or Excel files. Compare rows, columns and individual cell values in seconds.
My Recent Comparisons
| Project Name | Old File | New File | Key | Date | Actions |
|---|---|---|---|---|---|
| Excel |
Tier limits: Free: 20 rows • Pro: 100 rows • Pro Plus: 1,000 rows • Business: 2,000 rows
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Your plan allows comparing up to rows per file. Files exceeding this quota will compare the first rows. Upgrade for larger capacity.
Old File
Upload original or previous spreadsheet
Drop your old file here
Supports CSV, XLS, XLSX
• rows (capped from on )
New File
Upload updated or new spreadsheet
Drop your new file here
Supports CSV, XLS, XLSX
• rows (capped from on )
Record Matching Key
Select the unique identifier column to match corresponding rows across files
Analyzing files...
Comparison Results
Compared with using key:
New rows in latest file
Deleted from old version
Modified cell values
Exact identical rows
What Changed? — Modified Fields
Frequency of changes detected across each column
No cell changes were detected across common records.
Comparison Metadata
- Matching Column
- Total Rows (Old)
- Total Rows (New)
- Columns Compared
- Duplicate Keys
- Columns with Missing Data
Changed Records ()
Click any record to expand and inspect cell-level before and after differences
| Changes | Cell Modifications (Old → New) | Side-by-Side | |
|---|---|---|---|
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Added Records ()
Records present in the new file that did not exist in the old file
No new rows were added in this version.
Removed Records ()
Records present in the original file that were deleted in the new file
No rows were removed.
Unchanged Records ()
Rows with identical values across both spreadsheets (paginated for performance)
Duplicate Key Detection ()
Identified duplicate occurrences of the matching key ()
No duplicate keys detected
All matching key values are unique across both files.
| Old File Occurrences | New File Occurrences | Total Frequency | |
|---|---|---|---|
Missing Data Detection ()
Empty or null cell count per column across Old and New files
No missing data found
All detected columns contain complete cell values without blanks.
| Column Name | Empty in Old | Empty in New | Total Empty | Missing Rate |
|---|---|---|---|---|
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Record:
What Can You Compare?
Common business spreadsheets compared daily with pdfto
Product Catalogs
Compare SKU, price, stock, categories and product information between supplier updates.
Inventory Files
Find stock increases, decreases, out-of-stock items, and removed warehouse lines.
Customer Lists
Identify new, removed and updated customer records matched by email or customer ID.
Sales Data
Compare sales exports from different periods to pinpoint order status and volume shifts.
SEO Data
Compare crawl exports, URLs, titles, meta descriptions, and ranking changes.
Database Exports
Compare two SQL CSV dumps and audit schema modifications and row-level alterations.
How It Works
Compare any two spreadsheets in three straightforward steps
Upload
Upload your original (old) and updated (new) CSV or Excel files into the secure dropzones.
Compare
Choose a matching column or let pdfto auto-detect your unique identifier to find every difference.
Download
Export changed rows, duplicate reports, or a complete multi-sheet Excel comparison workbook.
Compare CSV and Excel Files Online
Comparing spreadsheet data between revisions is a critical task for e-commerce managers, data analysts, inventory controllers, and business operations teams. When working with product catalogs, customer lists, or monthly financial extracts, manually reviewing thousands of rows in Excel to locate modified cells or deleted entries is time-consuming and error-prone.
The pdfto CSV & Excel Compare Tool offers an instant, deterministic comparison engine that works across CSV, XLS, and XLSX file formats. Whether you are reconciling changes between two CSV files, comparing two XLSX spreadsheets, or matching an older XLS file against a fresh CSV export, the engine parses headers, detects the primary unique identifier (such as SKU, ID, or Order Number), and contrasts every field cell by cell.
Row & Cell Diff Intelligence
Isolates newly added rows, deleted records, and changed fields with precise before-and-after values.
Quality & Duplicate Audits
Flags duplicate keys and surfaces missing or blank data points across all columns.
Frequently Asked Questions
Everything you need to know about comparing spreadsheets on pdfto
Compare Your Files
Upload your old and new CSV or Excel files and find every important difference.