Data converters: CSV, Excel, JSON, XML, YAML and ZIP

27 free converters for spreadsheets, data and archives: CSV to Excel and back, CSV, Excel and JSON to each other, JSON, XML and YAML conversion, SQL, JSON and XML formatters, Base64, hashes and ZIP. 25 run in your browser; the 2 e-book converters (EPUB and MOBI) use our server and delete the file within about two hours. Converting images, PDFs or video? Pick the format in the list below.

Search in Data

Spreadsheets: CSV and Excel

CSV to ExcelTurn a CSV export into a real XLSX workbook that opens straight into columns, with no import wizard, no mangled accents and no lost leading zeros.

Excel to CSVExport XLSX, XLS and ODS sheets to CSV with the separator, encoding and line endings the receiving system actually wants.

CSV to JSONTurn a spreadsheet export into JSON, NDJSON or plain arrays, with the delimiter and the character encoding worked out for you.

Excel to JSONTurn a spreadsheet into JSON your code can actually consume: array of objects, array of arrays, or one array per column.

JSON to ExcelFlatten a JSON or NDJSON export into a spreadsheet. Nested objects become dot-named columns and every record contributes its keys.

Merge CSVCombine exports whose columns are in different orders, with different encodings and the odd extra field, into one clean CSV.

Data formats: JSON, XML, YAML

JSON to XMLBuild a valid XML document from JSON: you name the root and item tags, and keys XML cannot accept are repaired rather than dropped.

XML to JSONTurn XML into JSON with attributes, CDATA and namespaces handled the way you choose, and syntax errors that name the exact line.

YAML and JSONOne tool for both directions: the direction is worked out from the file, multi-document YAML is supported, and every error names its line.

XML to CSVTurn a feed, a product export or an RSS file into a spreadsheet table. The repeating record element is found for you, no XPath required.

CSV to XMLWrap a CSV table in valid XML: your own root and row tag names, columns as elements or attributes, headers repaired to legal tag names.

JSON to CSVFlatten an API response or an NDJSON export into a spreadsheet table, with every field from every record kept as its own column.

Developer tools

JSON FormatterIndent, minify or just check a JSON file, with the error located by line and column and the quiet problems named out loud.

XML FormatterIndent XML so a human can read it, collapse it onto one line, or just check it; comments, CDATA and attribute order come out untouched.

SQL FormatterIndent a query by its nesting, bring keywords to one case, or squeeze the whole thing onto one line for a log, across fifteen dialects.

CSS/JS/HTML MinifierStrip comments, indentation and dead whitespace out of stylesheets, scripts and pages, safely and without renaming a thing in your code.

Base64Encode text or a file to Base64, or decode it back, with URL-safe alphabet, Data URI and MIME line wrapping all handled.

File HashGet every checksum of a file or a string in one pass, and paste the expected value to see at a glance whether it matches.

Archives, e-books and other converters

Create ZIPPack files or a whole folder into one archive, keeping the folder structure and skipping pointless recompression of photos and video.

ePub to MOBITurn an ePub into a MOBI file to copy onto a Kindle by USB cable. No signup; runs on our server, and files are deleted within about two hours.

Extract ZIPUnzip an archive in the browser, including password-protected ones, with dangerous paths cleaned and damaged entries reported rather than hidden.

MOBI to ePubConvert a Kindle MOBI or AZW3 eBook to ePub, readable on any device except Kindle itself. No signup. Runs on our server; files are deleted automatically within about two hours.

Protect a fileWrap a KMZ, KML or any other file in an AES-256 encrypted archive that opens with your password in 7-Zip, WinRAR or the built-in unpacker.

Split CSVCut a large CSV into equal chunks, or into one file per value of a column, with the header, delimiter and encoding carried into every part.

Split ExcelBreak a multi-sheet workbook into separate files, or cut one long sheet into chunks of the row count you choose.

URL EncodePercent-encode text for a URL or read it back, with the three schemes that actually differ and a list handled line by line.

XML to ExcelTurn an XML feed or system export into a spreadsheet. The repeating record element is found for you, and attributes become their own columns.

Convert by format

Converting images, PDFs or video? Pick the format — HEIC, WebP, JPG, PNG, PDF, GIF, AVIF, SVG — or data: CSV, JSON, XLSX, ZIP.