What are the Celtrim Excel tools?

A set of free browser-based converters for spreadsheet jobs Excel makes awkward: exporting a cell range as a PNG, converting CSV to PDF, JSON to Excel, XML to CSV, Word tables to a workbook, turning delimited text into a valid CSV, and unlocking a read-only file.

Are the tools really free?

Yes. Every tool is free to use with no account, no trial, and no export limits.

Do my files get uploaded to a server?

No. All processing happens in your browser using local JavaScript, so the file never leaves your computer and nothing is stored.

Which file types are supported?

Image converters read .xlsx, .csv, and .tsv. Format converters also take .json, .jsonl, .xml, .docx, .txt, and pasted data. The unlocking tool reads .xlsx, .xlsm, .xltx, and .xltm. Legacy .xls and .doc files need to be saved as .xlsx or .docx first.

Do the tools work on Mac?

Yes. Everything runs in a normal web browser, so the tools work identically on Mac, Windows, Linux, and ChromeOS. There is nothing to install and no Excel add-in involved.

Free Excel tools that run in your browser

Small, single-purpose tools for the spreadsheet jobs Excel makes awkward — turning a range into a shareable image, converting JSON, XML, CSV, and Word tables into the file you actually needed, reading a workbook without Office, and unlocking one you are not allowed to edit. Nothing leaves your device.

Turn a range into an image

Pick the cells that matter and export a picture that stays readable in a slide, a ticket, or a chat message.

Excel to PNG

Open an .xlsx file, drag across the rows and columns you need, and export a PNG that keeps your formatting. Pivot subtotals and XLOOKUP results come out exactly as they appear.

.xlsx · .csv · .tsv

CSV to PNG

Drop in a .csv export, check that the columns parsed the way you expect, and download the range you need as a styled table image.

.csv · pasted rows

Google Sheets to image

Copy cells in Google Sheets and paste them in, or open a downloaded copy of the sheet. Same selection and styling controls as the Excel converter.

pasted cells · .xlsx · .csv

Convert between formats

Get data out of one shape and into another with the separators, quoting, and cell types handled properly.

Text to CSV

Paste tab, semicolon, pipe, or space aligned rows — or open a .txt file — and download CSV with the quoting rules actually applied, so it imports in one go.

.txt · .log · pasted text

Text to Excel

Build a real .xlsx workbook from a text file, with leading zeros, long account numbers, and dates surviving intact instead of being mangled by an import wizard.

.txt · .log · pasted text

XLSX to CSV

Turn a workbook into CSV, one sheet at a time or every sheet at once as a zip. Choose comma or semicolon so the file opens correctly wherever it is going.

.xlsx · .xlsm · .xltx

CSV to PDF

Print a CSV as a searchable table PDF. Landscape or portrait, headers that repeat, columns fitted to the page — without opening Excel.

.csv · .tsv · pasted rows

JSON to Excel

Arrays of objects become rows, nested fields flatten, and sibling arrays each get a sheet. Or drop a workbook to go back to JSON.

.json · .jsonl · .xlsx · .csv

XML to CSV

Repeating elements become rows, attributes become columns. Excel 2003 SpreadsheetML is read as a workbook. Download CSV or Excel.

.xml

Word to Excel

Pull every table out of a .docx into a real workbook, one sheet per table. Merged cells stay aligned. Paragraphs that are not tables are left behind.

.docx · .docm

Open and unlock files

Read a workbook without Excel, or get past the locks that stop you editing one.

Excel viewer

Open an .xlsx or .csv file in the browser, switch between its sheets, and search every cell at once. No Office, no account, and the file is never uploaded.

.xlsx · .xlsm · .csv · .tsv

Read-only Excel to editable

Removes sheet protection, workbook structure locks, read-only recommended, and marked as final. Encrypted files open too, once you supply the password.

.xlsx · .xlsm · .xltx

How these tools work

A spreadsheet file is a structured archive, and most of what people need from one is a small transformation of that archive: read the values out of a range so they can be drawn as an image, or drop the settings that tell Excel to keep the file locked. Each tool here does one of those transformations in the browser tab you already have open — no add-in, no account, and no round trip through a server.

Nothing is uploaded: Every tool reads and rewrites your file with local JavaScript. Your data, and any password you type, stay on your device.
No account, no limits: There is no sign-up, no watermark, and no cap on how many files you run through. Open a tool and use it.
One job each: These are small, single-purpose converters rather than another spreadsheet app. You get in, get the file you needed, and leave.

Common questions

What are the Celtrim Excel tools?: A set of free browser-based converters for spreadsheet jobs Excel makes awkward: exporting a cell range as a PNG, converting CSV to PDF, JSON to Excel, XML to CSV, Word tables to a workbook, turning delimited text into a valid CSV, and unlocking a read-only file.
Are the tools really free?: Yes. Every tool is free to use with no account, no trial, and no export limits.
Do my files get uploaded to a server?: No. All processing happens in your browser using local JavaScript, so the file never leaves your computer and nothing is stored.
Which file types are supported?: Image converters read .xlsx, .csv, and .tsv. Format converters also take .json, .jsonl, .xml, .docx, .txt, and pasted data. The unlocking tool reads .xlsx, .xlsm, .xltx, and .xltm. Legacy .xls and .doc files need to be saved as .xlsx or .docx first.
Do the tools work on Mac?: Yes. Everything runs in a normal web browser, so the tools work identically on Mac, Windows, Linux, and ChromeOS. There is nothing to install and no Excel add-in involved.

Guides and walkthroughs live on the Celtrim blog.