Open converter

COMPRESSED SPSS, LOCALLY

Open a .zsav file. Leave the data where it is.

This is a practical exit ramp for a compressed SPSS file: choose it, inspect the columns, then download a labelled CSV. The conversion happens in this browser tab — no account, queue, or research-data upload.

No .sav file to hand?

Why a .zsav file can be awkward to open

.zsav is not a different study format. It is an SPSS system file with a compressed ZLIB data block. That saves disk space, but it also means an older importer can recognise the filename and still stop at the data rows. This page reads both the SPSS metadata and the compressed rows, so the useful parts of the file stay together.

Start with the preview rather than downloading blindly. It lets you check variable names, descriptive labels, and declared missing values before you choose CSV. For survey data, switch the value-label option deliberately: Labels is easiest for people to read,Numeric codes is safer for a statistical script, andBoth preserves each interpretation side by side.

A small hand-off checklist for collaborators

  1. Open the .zsav file and verify the previewed column names.
  2. Choose labels, codes, or both based on the recipient's workflow.
  3. Download CSV, then keep the original .zsav as the archival copy.
  4. If column meanings matter outside your team, record variable labels and value labels alongside the CSV rather than relying on memory.

A CSV is intentionally less SPSS-specific. It travels well, but it cannot carry every SPSS setting forever. That is why this tool makes labels visible at the conversion step instead of silently flattening them into unexplained numbers.

When a regular .sav file is all you have

The same converter also accepts ordinary .sav files. Use the main SAV to CSV converter for that direct task, the SPSS file viewer when you only need to inspect a file, or SAV to Excel when a workbook is more useful than plain text.

ZSAV conversion questions

What is a .zsav file?

A .zsav file is an SPSS data file whose data section uses ZLIB compression. It contains the same kind of variables, labels, and cases as a .sav file; the compressed data block is why older readers sometimes reject it.

Does converting .zsav to CSV upload research data?

No. The reader, decompression, preview, and export run in the browser tab. Your selected file is not sent to savtocsv for conversion.

Will labels such as 1 = Yes survive the export?

Yes. Labels are selected by default. You can export numeric codes instead, or choose Both to retain a human-readable labelled column next to its raw code.

Can I open the CSV in Excel, R, or Python?

Yes. CSV is a plain, portable table format. Excel and Google Sheets open it directly; R and Python can read it without SPSS-specific software or drivers.