SheetCompareFeature-by-feature
| Feature | SheetCompare | ExtendsClass CSV Diff |
|---|---|---|
| Starting price | Free | Free |
| Runs in browser (no upload) | ||
| Free tier | ||
| Cross-format diff (CSV ↔ XLSX) | ||
| Cell-by-cell highlighting | ||
| Header-name column matching | ||
| No signup required | ||
| Desktop app |
SheetCompare
Browser-based spreadsheet diff that compares CSV, XLSX, XLS, and TSV files cell-by-cell without uploading them anywhere — files are parsed and diffed entirely in the browser.
Strengths
- client-side parsing — files never leave your browser
- cell-by-cell comparison with per-cell highlighting
- added, removed, and changed row detection
- header mismatch detection across files with different column orders
- junk-row detection for messy real-world exports
Limits
- no formula or VBA-level comparison — values only
- no desktop app
- free tier capped at 5,000 rows per file
ExtendsClass CSV Diff
Developer-focused online toolbox with a CSV diff utility among dozens of other developer tools — comparison is one feature of many.
Strengths
- browser-based CSV comparison
- paste or upload CSV data
- client-side processing
- visual diff output
- free with no account required
Limits
- CSV only — no Excel support
- bare-bones UI with no export
- no key-column matching
- comparison is a minor feature of a general dev toolbox
- no PDF or Excel export
Choose SheetCompare when
Analysts, accountants, ops teams, and developers who need to spot differences between two spreadsheet exports without installing software or trusting an upload.
Choose ExtendsClass CSV Diff when
Developers who need a quick throwaway CSV comparison without leaving the browser.
Frequently asked questions
What's the main difference between SheetCompare and ExtendsClass CSV Diff?▾
Browser-based spreadsheet diff that compares CSV, XLSX, XLS, and TSV files cell-by-cell without uploading them anywhere — files are parsed and diffed entirely in the browser. Developer-focused online toolbox with a CSV diff utility among dozens of other developer tools — comparison is one feature of many. The practical difference: SheetCompare keeps your data in the browser tab; ExtendsClass CSV Diff also runs locally but is built for developers who need a quick throwaway csv comparison without leaving the browser.
Is SheetCompare cheaper than ExtendsClass CSV Diff?▾
SheetCompare starts free (5,000 rows per file, no signup). Pro is $12/month. ExtendsClass CSV Diff is free for the base tier. For most spreadsheet diff workflows the price gap isn't the deciding factor — the privacy model and the cross-format support usually are.
Can ExtendsClass CSV Diff compare CSV against XLSX?▾
ExtendsClass CSV Diff is primarily focused on browser-based CSV comparison, so cross-format diffs typically require converting one file first. SheetCompare handles cross-format natively — the parser layer normalizes both inputs before the diff runs.
When should I pick ExtendsClass CSV Diff over SheetCompare?▾
ExtendsClass CSV Diff is the right choice if your workflow needs: browser-based CSV comparison, paste or upload CSV data, client-side processing. Those are real strengths and we don't try to match all of them.
Where does SheetCompare run?▾
Entirely in your browser. JavaScript parses both files in-tab, the diff runs in-tab, and nothing is uploaded to a server. You can verify this in your browser's network tab while using the tool.