Data and document tools
Convert spreadsheets, documents, and archives without uploading them.
By opening this website or using its tools, you agree to our Terms and Privacy Policy.
Most popular
All data tools
Pull every sheet out of an .xlsx workbook as CSV or TSV.
Build a real .xlsx workbook from one or more CSV files.
Turn rows into JSON objects, arrays, or newline-delimited JSON.
Flatten nested JSON records into a spreadsheet-ready table.
Repair encoding, delimiters, ragged rows, and stray whitespace.
Render Markdown to HTML, PDF, or a Word document.
Turn a .docx file into PDF, HTML, or plain text.
See what a resume parser reads, then rebuild it plain.
Create a zip archive, or open one and pull files out.
MB, GB, TB and their binary twins MiB, GiB, TiB — both answers, side by side.
About these tools
Spreadsheets, Word documents, and zip archives are all the same kind of thing underneath: a zip container holding XML. That is what makes this category possible in a browser at all — the files can be opened, read, and rebuilt with the same machinery, without a server and without anything being uploaded. For this category in particular that is worth something concrete, since the files people convert here are payroll exports, customer lists, contracts, and invoices.
The conversions split into two halves. The tabular tools move a grid of values between Excel, CSV, and JSON, and their real work is typing rather than syntax: deciding what a run of digits means. Leading zeros are kept as text so zip codes and phone numbers survive, long digit strings are kept as text so account numbers are not rounded, and ambiguous dates are left alone because 03/04/2024 means two different days in two different countries. The choices are shown as options rather than made invisibly.
The document tools go the other way, from a written document to a shareable file. Markdown and Word both reduce to the same internal structure — headings, paragraphs, lists, tables, code, links — which is then typeset as PDF or written as a Word file. That means the content and structure come across faithfully while the exact page layout does not, and the tools say so rather than implying otherwise. Where a conversion cannot be exact, what changed is reported: characters a PDF font cannot draw, styles the Word reader could not map, rows a CSV cleaner repaired.
FAQ
Are my spreadsheets and documents uploaded?
No. Every tool here runs in your browser, and each tool page shows a live network monitor during processing that stays at zero bytes sent.
Can these tools open .xls and .doc files?
No. The legacy Excel and Word formats are binary files unrelated to the modern .xlsx and .docx, which are zip containers of XML. The tools detect them and explain rather than failing oddly — re-save as .xlsx or .docx first.
Why does the PDF output not match my Word document exactly?
Because it is rebuilt from the document’s structure, not from Word’s page layout. Text, headings, lists, tables, and emphasis are faithful; exact page breaks, margins, headers and footers, and images are not. For a layout-faithful PDF, use Word’s own export.
How do I stop Excel from mangling leading zeros in my CSV?
Use the CSV to Excel tool rather than opening the CSV directly. It writes a real .xlsx workbook and keeps any value with a leading zero as text, so 00123 stays 00123.
Is there a file size limit?
None imposed by us, since nothing is uploaded. Your device’s memory is the practical ceiling, and very large files may be slow on older machines.