A small tool that does one job properly.
TidyCell cleans messy Excel and CSV files and gives you your real workbook back. That's the whole product.
It started with one export nobody wanted to open.
A report came out of a manufacturing system the way those reports always do: numbers stored as text, three different date formats in one column, trailing spaces you can't see, the same customer name spelled four ways, and a header row that started on line 6.
Fixing it was an afternoon of find-and-replace. The tools that promised to do it either wanted the file uploaded to somebody's server, or handed back a stripped-down CSV with every formula and every other sheet gone.
You could paste the whole thing into ChatGPT and talk it through. Most people won't — because it's work data, because it's tedious, and because you have no way to check what it actually changed. TidyCell is for exactly those people: it shows you every change before it makes it, and your file never leaves your browser to begin with.
Four decisions everything else follows from
Your file stays on your computer
Reading your spreadsheet, cleaning it and building the file you download all happen in your browser. Not as a setting — as the architecture. We can't look at your rows because they never reach us.
Boring code first, AI second
Splitting a column, fixing dates, finding duplicates — these are solved problems, and solved problems should be fast, free and private. We do them deterministically in code. AI is layered on top to make it better, never underneath holding it up.
One thing at a time
No black box that hands back a file and hopes you trust it. You pick a tool, see the exact before and after, approve it, and it becomes a step you can undo. Nothing changes without you seeing it first.
We tidy, we don't rebuild
Most cleaning tools rebuild your workbook from scratch and quietly lose your formulas, your formatting and your other sheets. We mutate the file you gave us and leave everything we didn't touch byte-for-byte identical.
One person, in the open
TidyCell is built and run by Blaine Ritz, an independent software developer in the United States. It isn't venture-funded and there's no support queue between you and the person who wrote the code.
If you email hello@tidycell.com, that's who replies — usually within one business day.
How we make money
People pay us. That's the entire model, and it's worth saying out loud because the alternatives are what make free tools untrustworthy.
- Free cleans files up to the free row limit, with no account and no catch.
- $4 unlocks one file completely, forever.
- Pro is a monthly subscription for people who do this often.
There are no ads. We don't sell, rent, broker or train on your data — we don't have your data. Payments run through Stripe, so we never see a card number either.
See the full pricing →Try it on something messy
No account, no upload. Drop a file and see what it finds.