Compare two CSV files by ID, review the changed values, and choose what to keep. Start free with files on your device or try the sample below.
Comparison and downloads run on your device. No account needed.
UTF-8 CSV or tab-separated text · 2 MiB, 10,000 records, 100,000 cells and 100 columns per file
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A CSV diff compares records, not line positions. Choose an ID such as a SKU or customer number to match each record across two exports. Reordering the same rows creates no changes. A shared key with different values becomes a changed record; a key on only one side becomes an addition or removal.
Match the previous catalogue and the new price list by SKU. Review the before-and-after price, distinguish new products from items missing in the new list, and accept only the changes the buyer has checked. Skip supplier export dates so they do not drown out useful changes.
Compare two stock snapshots by SKU and location. A composite key keeps the same item in two warehouses separate. Inspect quantity differences as literal values, then give unexpected records to the operations team instead of treating every missing row as an instruction to delete.
Compare extracts from the old system and the new one using stable record IDs. Find missing IDs and changed mapped values, keep the report with the migration batch, and investigate exceptions alongside the other checks in your migration plan.
The reviewed CSV starts from your original table. Approve a changed record to copy its changed mapped cells, an added record to append it, or a removed record to omit it. Leave a change unchecked to keep the original position and values. You can change these decisions before every download.
A row-aware diff is useful when records are the unit of work. Keep a text diff for text, and a spreadsheet for calculations or a one-off manual investigation.
| Approach | Best fit | Next step |
|---|---|---|
| Text diff | Source files and exact line-by-line edits | Read or merge changed lines |
| Spreadsheet | Formulas, flexible analysis and manual checks | Build lookups and review the workbook |
| This CSV tool + Teable | Keyed record changes followed by team review | Download an approved file or create a review table |
Use Continue review in Teable when more people need to resolve the changes. The button uploads the report and carries it into a request for a new table. Keep old and new values together, assign owners, add review notes, and use views to separate additions, removals and edits.
Choose UTF-8 CSV files or paste tab-separated cells from a spreadsheet. The first row supplies the headers. Load the sample to explore the tool without using your own data.
Map the columns, choose one or more stable keys, then run the comparison. Fix blank or duplicate keys first so a record cannot be matched ambiguously.
Filter the differences, inspect the values, and approve what belongs in the next file. Download the report or reviewed CSV; continue in Teable when you need shared ownership.
Yes. Comparing, approving and downloading CSV files here is free and requires no account. Continuing in Teable opens the app; its AI and workspace usage follow the current plans. View Teable pricing
Use UTF-8 .csv or .tsv files, or paste comma-, semicolon- or tab-separated text with headers. Each input supports up to 2 MiB, 10,000 records, 100,000 cells including headers, and 100 columns. Export Excel workbooks as UTF-8 CSV first.
Choose a stable key and row order is ignored. Use multiple key columns when a single ID repeats, such as SKU plus warehouse. Blank and duplicate keys must be resolved before comparing.
Yes. After reading both files, select the updated column corresponding to each original column. Skip fields outside your review. Each updated column can be mapped once. The reviewed output uses the original columns.
It compares strings, without guessing number formats or converting dates. Values such as 01 and 1 remain different. Optional settings ignore surrounding spaces or letter case; the original data remains unchanged.
The change report contains keys, statuses, original/updated records and approval choices. The reviewed CSV contains the original table with only approved changes applied. Approving a removal omits that row. No approval means the original row is retained.
Reading, comparing and downloading run in your browser. Only Continue review in Teable uploads the generated change report. Your two original files are not uploaded by that action. Clear all or close the tab when finished; the tool does not save a comparison for your next visit.
The continuation prepares a new review-table request containing the report. Use it to assign owners and track decisions. Applying changes to another table or source system is a separate step you configure and check in Teable.
Start with two exports and leave with a file you have reviewed.
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