W
Reports out of a system
Accounting, CRM, payroll, the till — they all export CSV, and every one needs tidying before anyone reads it.
CSV IN · PROPER XLSX OUT · SEVERAL AT ONCE
CSV in, a real spreadsheet out
Upload one CSV or a pile of them and get proper XLSX workbooks back — columns split where they should be, accents intact, leading zeros still leading zeros. The separator and the encoding are read from the file, so a semicolon export from a European system comes out as a table rather than one long column.
Convert CSV files to Excel
XLSX out
Drop your CSV files here or browse
orders-january.xlsx
Ready
3 workbooks · same names
No import wizard, no delimiter dropdown, and no "keep in this format?" every time you save.
Upload, wait a moment, download. This is the whole app.
Anonymous · nothing kept · files deleted after 60 minutes
4.8 / 5
10,000+ paid members
€1 day pass · €6 yearly · €30 lifetime · no ads, ever
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One account unlocks all 79 AppsCyborg tools
Convert, compress, merge, split — spreadsheets, PDFs, images, video and more. See all tools →
Two steps. That's it.
1
Upload your CSVs
Up to 50 · 200 MB each
2
Download the workbooks
PDF
orders-january.xlsx
Same name · real columns
Your download link Stays live for 60 minutes. Save the workbooks as soon as they're ready — after that the link expires and the files are removed.
Why not just open it in Excel?
Sometimes that works. Sometimes the whole file lands in column A, the accents turn to gibberish, your product codes lose their leading zeros, and every save asks whether you really want to keep this format.
Columns where they belong
Commas, semicolons or tabs, and quoted fields with separators inside — it comes out as a table, not one long column. The separator is worked out from the file, not from your computer's locale.
Accents survive
Müller stays Müller. The encoding is taken from the file itself, so a Windows-1252 export from a European system arrives intact — no mojibake to find and replace across ten thousand rows.
Exports stay private
Nothing kept, read or used to train anything. Files go when the 60-minute link expires. Worth knowing, since most CSV exports are customer lists, orders or payroll.
Try it for €1
A 24-hour day pass costs €1. No subscription, no auto-renewal — enough for this month's batch, and you can decide later.
START HERE
Day pass
€1
/ 24 hours
A month of exports to turn into workbooks? Unlimited conversions for 24 hours. No commitment.
- Unlimited conversions for 24h
- No subscription, no auto-renew
Yearly
€6
/ year
The price of a coffee, once — for a whole year of conversions.
- Unlimited for 365 days
- Best value if reports land in your inbox as CSV every week
Lifetime
€30
once
Pay once, own it forever. Every future format and update included.
- One payment, never again
- All future updates included
Every plan unlocks all 79 AppsCyborg tools — no ads, no watermarks.
CSV to Excel Cyborg vs. the alternatives
| CSV to Excel Cyborg | Double-click the CSV | Excel's import wizard | |
|---|---|---|---|
| Several files at once | Yes | One at a time | One at a time |
| Steps per file | Upload, download | One click, then hope | Six screens of options |
| Semicolon and tab files | Read from the file | Depends on your locale | If you pick it |
| Ends as a real XLSX | Excel's import wizard | ||
| Needs Excel installed | Yes | ||
| Price | From €1 | Free | €20–60 |
For one tidy comma-separated file, double-clicking is fine and free — use it. This is for the other case: a dozen exports from a system that writes semicolons, a laptop set to a locale that disagrees, and a deadline. The import wizard can fix each file individually if you enjoy six dialog screens per file. Upload the lot, get workbooks back with the same names, and spend the time on the numbers instead.
What the conversion decides, and what it leaves alone
A CSV is just text: it records no separator, no encoding and no types. Guessing wrong is how a file ends up in one column, or how a product code turns into a number. So each of those is worked out from the file, and where the file cannot answer, nothing is changed.
50
files at once
200
MB per file
60
minutes to download
0
wizard screens
The separator is read, not assumed
;Comma, semicolon, tab or pipe. Each is tried against the first rows and the one that gives every row the same number of fields wins — so a comma inside "Smith, John" doesn't get a vote, and a semicolon file doesn't need you to know it's a semicolon file.
The encoding comes from the file
éA byte-order mark is believed, UTF-8 is taken as it is, and anything else is read as Windows-1252 — which is what Excel writes on a Western European machine, and the usual source of "Müller".
Leading zeros are kept
00041 stays 0041. A value written with a leading zero is a code — a SKU, a postcode, a phone number — not the number 41, and turning it into one is the kind of change nobody notices until an invoice goes out wrong.
Real numbers are still numbers
Σ1240.50 arrives as a number, so the column still sums, sorts and charts. Only the values that would need guessing are left as text.
One workbook per file, same name
1:1orders-january.csv becomes orders-january.xlsx, with the sheet named after it and the columns sized to what's in them. Send several and they come back together.
What is deliberately left alone
Anything that would need a locale the file doesn't carry stays exactly as written: 1.240,50 and 03/04/2024 arrive as text rather than being read as a number or a date, because nothing here can know whether that's the third of April or the fourth of March. If you want them as numbers or dates, converting a column you can see is safer than a converter guessing at one it can't.
Going the other way — a workbook back to CSV?
See it in action
A folder of exports, a folder of workbooks · Watch the walkthrough →
A short walkthrough: several CSV exports in, several workbooks out.
Ready to try it? Continue with Google above.
Where the CSVs come from
Almost every system exports CSV. Almost nobody wants to work in one.
R
Monthly batches
Twelve files for twelve months, converted in one go and named the same as they went in.
P
Sending it on
A colleague who opens a CSV and sees one column will assume you sent a broken file. An XLSX just opens.
F
European exports
Semicolons, comma decimals and accented names — the combination that most reliably lands in one column, and the one this was built for.
T
Archiving
A workbook keeps its column widths and its header row. A CSV keeps nothing but the text.
S
Uploads that want XLSX
Plenty of portals and templates accept Excel files only, however happily the data started life as CSV.
Whatever it's for, upload the CSVs and download the workbooks.
Need something slightly different?
Going the other way? Excel to CSV Cyborg. Need each sheet as its own file? Split Excel Cyborg. Sending the result to someone who shouldn't edit it? Excel to PDF Cyborg — all included in one account.
Common questions
Getting started
What is CSV to Excel Cyborg?
A web app that converts CSV files into Excel workbooks. Upload one or several, get XLSX files back with the same names. Nothing to install, no ads.
Do I need Excel installed?
No — it runs in the browser, so a Chromebook or a locked-down work laptop is fine. Excel, Google Sheets, Numbers and LibreOffice all open what comes out.
Can I convert several files at once?
Yes — up to 50. Each comes back as its own workbook keeping its original name, which is the main reason to use this rather than opening them one by one.
Your data
My file uses semicolons, not commas.
That's fine. Commas, semicolons, tabs and pipes are all read from the file itself — each is tried against the first rows and the one that gives every row the same number of fields wins. You don't pick a delimiter anywhere, and it doesn't depend on your computer's locale.
Will it keep my leading zeros?
Yes. 0041 stays 0041. A value written with a leading zero is a code — a SKU, a postcode, an account number — not the number 41, so it's kept as text. Values that really are numbers, like 1240.50, still arrive as numbers, so those columns sum and sort as usual.
What about accented characters?
They come through. The encoding is taken from the file: a byte-order mark is believed, UTF-8 is read as UTF-8, and anything else as Windows-1252 — which is what Excel writes on a Western European machine. The garbled "Müller" you get from double-clicking is Excel guessing the wrong encoding, and you shouldn't see it here.
What happens to dates and European decimals?
They're left exactly as written. 03/04/2024 could be the third of April or the fourth of March, and 1.240,50 needs to know the file's locale — neither is recorded in a CSV, so nothing guesses. They arrive as text, and you can convert a column deliberately if you want to.
Do several CSVs become one workbook?
No — one workbook per file, matching names, and the sheet inside is named after the file too. If you want them as tabs in a single book, convert them and then copy the sheets together in Excel.
How big can the files be?
Up to 50 files, 200 MB each. A large one simply takes longer — a 200,000-row export converts in about two seconds. Worth knowing that a worksheet stops at 1,048,576 rows, so a CSV longer than that can't fit in one sheet no matter what converts it.
What if a row is broken?
A row with the wrong number of fields is kept rather than treated as the end of the file, and a genuinely malformed line is skipped instead of failing the whole export. One bad line shouldn't cost you the other two hundred thousand.
Price and privacy
How much does it cost?
A €1 day pass gives you 24 hours of unlimited conversions. Yearly (€6) and lifetime (€30) plans are also available, and every plan unlocks all 79 AppsCyborg tools.
When does the download link expire?
After 60 minutes. Save the files as soon as they're ready — after that the link expires and you'd upload the CSVs again.
What happens to my data?
Your CSV is used to make the workbook and then deleted along with it when the 60-minute link expires. Nothing is kept, read, indexed or used to train anything, and requests are anonymous — no ads, no trackers. Worth knowing, since most CSV exports are customer lists, orders or payroll.
Can I use the result commercially?
Yes. The data is yours; the workbook made from it is yours to sell, send or publish. No attribution needed.
Still have a question?
We usually reply within a day.
Proper workbooks, in about a minute.
Create an account and upload your CSVs — real columns, accents intact, nothing kept.
Up to 50 files at once
€1 day pass
Files deleted after 60 min
No card needed to create an account — you pay when you download.
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