Do my documents get uploaded?

No. Conversion happens in the browser tab, with open-source parsers that run on your device. Nothing about the document — not the text, not the filename — is sent to Filesvo.

Which document and data formats can I convert?

CSV, JSON and XML in both directions, Markdown and HTML in both directions, Excel workbooks to and from CSV, plain text to PDF and Word, and EPUB to PDF.

Will the formatters change my data?

The JSON and XML formatters only re-indent and validate — the values and structure come out exactly as they went in. Invalid input is reported instead of being quietly repaired, and the JSON formatter points at the line and column where parsing stopped.

Is there a file size limit?

100 MB per file, the same cap as everywhere else on Filesvo. Very large spreadsheets are also limited in practice by how much memory the browser hands a single tab.

Document & Data Tools

Convert CSV, JSON and XML in both directions, turn Markdown into HTML and back, tidy up JSON and XML with the formatters, and make a PDF from plain text — fast, free and entirely in your browser. Every tool shows honest results and never uploads your data.

Convert data

CSV to JSON Converter

Turn CSV data into JSON — paste or upload, pick the delimiter, get an array of objects. Runs entirely in your browser.

JSON to CSV Converter

Turn a JSON array of objects into CSV with proper quoting — entirely in your browser.

XML to JSON Converter

Turn XML into readable JSON — attributes, nested elements and repeated tags handled — entirely in your browser.

JSON to XML Converter

Turn JSON into well-formed, pretty-printed XML with a root element you choose — entirely in your browser.

Markdown to HTML Converter

Turn Markdown into clean HTML — headings, lists, tables, code blocks and links — entirely in your browser.

HTML to Markdown Converter

Turn HTML into clean Markdown — headings, lists, tables, links and code blocks — entirely in your browser.

CSV to Excel Converter

Turn a CSV file into a real Excel .xlsx workbook — entirely in your browser.

Excel to CSV Converter

Extract any sheet of an .xlsx workbook as clean CSV — entirely in your browser.

TXT to Word Converter

Turn a plain text file into a real Word .docx document — entirely in your browser.

EPUB to PDF Converter

Turn an EPUB ebook into a paginated PDF you can read or print anywhere — in your browser.

Format & validate

JSON Formatter & Validator

Pretty-print, validate or minify JSON with clear error messages — entirely in your browser.

XML Formatter & Validator

Pretty-print and validate XML with clear error messages — entirely in your browser.

Text to PDF

TXT to PDF Converter

Turn a plain text file into a clean, paginated PDF — entirely in your browser.

Guides

How to convert TXT to Word

Get a real .docx out of a plain text file — with the accents, quotes and dashes still intact.

Word and Excel conversion needs a different engine and is on the roadmap — these tools cover the open text and data formats browsers can process natively.

Frequently asked questions

Do my documents get uploaded?: No. Conversion happens in the browser tab, with open-source parsers that run on your device. Nothing about the document — not the text, not the filename — is sent to Filesvo.
Which document and data formats can I convert?: CSV, JSON and XML in both directions, Markdown and HTML in both directions, Excel workbooks to and from CSV, plain text to PDF and Word, and EPUB to PDF.
Will the formatters change my data?: The JSON and XML formatters only re-indent and validate — the values and structure come out exactly as they went in. Invalid input is reported instead of being quietly repaired, and the JSON formatter points at the line and column where parsing stopped.
Is there a file size limit?: 100 MB per file, the same cap as everywhere else on Filesvo. Very large spreadsheets are also limited in practice by how much memory the browser hands a single tab.