About
Shrink files for upload limits, email attachments and sharing, right on your iPhone.
Choose a size limit for supported photos, PDFs, videos, audio or Office documents. UnderLimit creates a new copy, checks its actual size and leaves your original untouched. If it cannot reach your target, it tells you.
Scan documents, combine PDFs, fit several attachments into one shared size budget, or package files in a ZIP. Processing stays on your iPhone. No account, cloud upload, subscription or usage quota. CA$6.99 once on the Canadian App Store. Requires iOS 18 or later.
PDF compression creates flattened copies and removes searchable text, links, forms and annotations; accessibility information may be lost. Preview your output before sharing. ZIP archives may be larger than their contents.
Screenshots show UnderLimit 1.6 with sample files. Results depend on your files and settings.