TransformaHow to Open and Extract ZIP Files on iPhone
Receiving archive files on your iPhone is increasingly common — project files from colleagues, asset bundles from designers, or downloaded content from the web. While iOS has basic ZIP support, Transforma handles 6 archive formats (ZIP, TAR, GZIP, BZ2, XZ, and 7z) with per-entry progress reporting and security checks against path traversal attacks that could place files in unintended locations.
Quick Answer
Open Transforma, select any archive file (ZIP, TAR, 7z, GZIP, BZ2, or XZ), tap Extract, and save the contents to your chosen location in the Files app. Extraction includes path traversal security checks and per-entry progress tracking.
Why You Might Need This
- Email attachments, file transfers, and web downloads frequently arrive as compressed archives that need extraction before use.
- The built-in iOS Files app only handles basic ZIP files — TAR, 7z, GZIP, BZ2, and XZ archives require a dedicated extraction tool.
- Project deliverables from developers, designers, and photographers are commonly packaged as archives with complex folder structures.
- Security matters when extracting archives — malicious ZIP files can use path traversal attacks to place files outside the intended extraction directory.
- Large archives with hundreds of files benefit from per-entry progress reporting so you know how extraction is proceeding.
Step by Step
Open Transforma and select your archive
Launch Transforma and select the archive file you want to extract. Supported formats include ZIP, TAR, GZIP (.gz, .tar.gz, .tgz), BZ2 (.bz2, .tar.bz2), XZ (.xz, .tar.xz), and 7z.
Tap Extract to begin
Tap the Extract button to start decompression. Transforma performs path traversal security checks on each entry to prevent any file from being placed outside the extraction directory. Progress is reported per entry.
View the extracted files
Once extraction completes, you can browse the extracted files and folder structure directly. Verify that the contents match what you expected before saving.
Save extracted files to your chosen location
Save the extracted files to your preferred location in the Files app — iCloud Drive, On My iPhone, or any connected cloud storage. The original folder structure from the archive is preserved.
Tips for Best Results
- Transforma supports 6 archive formats: ZIP, TAR, GZIP, BZ2, XZ, and 7z — covering virtually every compressed archive you'll encounter.
- Path traversal security checks run automatically on every entry, protecting you from malicious archives that attempt to write files outside the extraction directory.
- Per-entry progress tracking shows you exactly which file is being extracted, which is especially useful for large archives with hundreds of entries.
- The original folder structure inside the archive is preserved during extraction, maintaining the organization set by whoever created the archive.
- All extraction happens on-device — archive contents are never uploaded to external servers, keeping your files private and the process working offline.
Frequently Asked Questions
What archive formats are supported?
Transforma supports ZIP, TAR, GZIP (.gz, .tar.gz, .tgz), BZ2 (.bz2, .tar.bz2), XZ (.xz, .tar.xz), and 7z archives. This covers the vast majority of compressed file formats used across macOS, Windows, and Linux systems.
Is it safe to extract unknown archives?
Transforma includes path traversal security checks that prevent malicious archive entries from writing files outside the intended extraction directory. This protects against a common attack vector in crafted ZIP files. However, you should still exercise caution with archives from untrusted sources.
Can I extract password-protected ZIP files?
Support depends on the encryption method used. Standard ZIP encryption (ZipCrypto) and some AES-encrypted archives can be handled, but some advanced encryption schemes may not be supported. You'll be prompted for the password if one is required.
Where are the extracted files saved?
You choose the save location after extraction completes. Files can be saved to any location accessible through the Files app — On My iPhone, iCloud Drive, Dropbox, Google Drive, or any other connected storage provider. The archive's folder structure is preserved.
Try It Yourself with Transforma
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