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trunc
Unpack archives bigger than your free space
trunc extracts archives and deletes them as it goes, so you only need room for the files, not the files plus the archive. A 3.3 GB ZIP that needs 8.4 GB of disk with 7-Zip takes 5.3 GB with trunc. It works on ZIP, tar (.gz,bz2,xz,zst), ISO and split archives, and is safe to interrupt: trunc resume picks up after a crash or a full disk. It also packs folders into its owntrnc format, built to be extracted this way from the start. Free and open source, Windows and Linux.
Hey Product Hunt, I made trunc.
I kept running out of disk space unpacking big archives. A 40 GB archive with 60 GB free should fit, but every extractor keeps the whole archive until it's done, so you need room for both.
trunc deletes the archive while it extracts. ZIP, ISO and tar files are cut from the end once the files stored there are on disk. Compressed tarballs (.gz, .bz2, .xz, .zst) give space back every 64 MiB as they're decoded.
Since it's deleting the input, it's built so a crash can't lose anything: nothing is freed until the files it held are verified and on disk, and "trunc resume" picks up after a crash, a kill or a full disk. "trunc plan" tells you up front how much space you need.
It's a command-line tool for Windows and Linux, free and open source. Install with cargo install trunc-cli, or the one-line installers on GitHub.
Limits worth knowing: freeing space mid-file needs NTFS, ext4, XFS, btrfs or ZFS; don't use it in cloud-synced folders; macOS is untested.
I'd like to hear which archive formats or setups you'd want it to handle next.
About trunc on Product Hunt
“Unpack archives bigger than your free space”
trunc was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #121 on the daily leaderboard. trunc extracts archives and deletes them as it goes, so you only need room for the files, not the files plus the archive. A 3.3 GB ZIP that needs 8.4 GB of disk with 7-Zip takes 5.3 GB with trunc. It works on ZIP, tar (.gz,bz2,xz,zst), ISO and split archives, and is safe to interrupt: trunc resume picks up after a crash or a full disk. It also packs folders into its owntrnc format, built to be extracted this way from the start. Free and open source, Windows and Linux.
On the analytics side, trunc competes within Open Source, Storage, Developer Tools and GitHub — topics that collectively have 638.9k followers on Product Hunt. The dashboard above tracks how trunc performed against the three products that launched closest to it on the same day.
Who hunted trunc?
trunc was hunted by Divyansh Agrawal. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of trunc including community comment highlights and product details, visit the product overview.
Divyansh Agrawal