Question 1

What codecs does Voidex use?

Accepted Answer

Voidex selects a codec per file based on its content: zstd or Brotli for text and code, LZ4 for speed-sensitive data, and xz for maximum ratio. It creates standard ZIP archives and its own verified VDX format.

Question 2

How does Voidex verify archives?

Accepted Answer

Every VDX/VDXA archive Voidex creates is verified with a SHA-256 Merkle tree before Voidex reports success. The archive is re-read and checked against the tree so a truncated or corrupted file is never presented as finished.

Question 3

Does Voidex upload files to the cloud?

Accepted Answer

No. All compression, extraction and verification run locally on the user's PC. Voidex requires no account and uploads zero bytes for regular archive work.

Question 4

What formats can Voidex open?

Accepted Answer

Voidex creates VDX and ZIP archives and opens/extracts ZIP, 7z, RAR, VDX and VDXA files, with direct preview for the most common formats.

Question 5

How does Voidex compare to 7-Zip?

Accepted Answer

Both are free and local-first. Voidex adds content-aware codec selection (zstd, Brotli, LZ4 or xz per file), verifies every archive before reporting success, ships as one portable ~15 MB executable with a modern UI and no ads. 7-Zip is a long-established classic with a dated interface.

Question 6

Is Voidex a good WinRAR replacement?

Accepted Answer

Yes. Voidex is completely free where WinRAR is shareware, opens ZIP, 7z and RAR archives, creates ZIP and its own verified VDX format, and in a reproducible 100-test benchmark produced the smaller archive in 89 cases with 5.5% less total output than WinRAR 7.11 in Smallest mode.

Question 7

Is Voidex really free?

Accepted Answer

Yes. Voidex has no paid tiers, no ads, no trial and no feature gates. Compression, archive opening and verification are free.

Question 8

How reproducible is the Voidex benchmark?

Accepted Answer

The benchmark runs 100 lossless compression tests with a documented methodology and raw CSV/JSON results committed to the Voidex repository. Voidex produced the smaller archive in 89 of 100 cases and 5.5% less total output than WinRAR 7.11 in Smallest mode.