File Converter

ODS to JSON converter Free, private, no upload.

Convert ODS files to JSON right in your browser. JSON is what APIs, JavaScript and almost every programming language read natively. Your files are never uploaded.

or drop files anywhere · paste with Ctrl/⌘ + V

How to convert ODS to JSON

  1. 1 Drop your ODS files onto the page, or click “Choose files”. You can add many at once, or a whole folder.
  2. 2 JSON is already selected as the output. Optionally open Options to adjust sheet, every sheet as its own file.
  3. 3 Click Convert, then Save. Converting several files? Save them all as one ZIP.

About the formats

ODS · OpenDocument spreadsheet

ODS is the open spreadsheet format used by LibreOffice and OpenOffice.

JSON · JavaScript Object Notation

JSON is the most common data format for APIs, configuration files and web apps.

The conversion runs on your device using pdf.js, pdf-lib, pdfmake, mammoth and SheetJS. You can adjust: sheet, every sheet as its own file.

Frequently asked questions

How do I convert ODS to JSON?

Drop your ODS files onto the page, or click “Choose files”. You can add many at once, or a whole folder. JSON is already selected as the output. Optionally open Options to adjust sheet, every sheet as its own file. Click Convert, then Save. Converting several files? Save them all as one ZIP.

Are my files uploaded to a server?

No. The conversion runs entirely in your browser using WebAssembly. Your files never leave your device, so it is safe for private photos, contracts and business data. Once the page has loaded it even works offline.

Will converting ODS to JSON reduce quality?

No. Both ODS and JSON keep full quality, so the conversion is lossless.

Can I convert multiple ODS files to JSON at once?

Yes. Add as many ODS files as you like; they are converted in parallel on your device and you can download them all as a single ZIP.

Is it free? Are there limits?

It is free, with no sign-up, no watermark and no daily limits. Because nothing is uploaded there is no upload size limit either; the only limit is your device’s memory, which matters mostly for very large videos.

See everything the ODS converter and the JSON converter can do.