Make an image or flattened PDF copy fit under a file-size limit—without uploading it anywhere.
UnderLimit is a focused, private file compressor for the moments when a form, portal, email, or message rejects an image or PDF as too large.
COMPRESS IMAGES
1. Select one JPEG, HEIC, or PNG from Photos or Files.
2. Enter a maximum from 10 KB to 100 MB, using decimal KB or MB.
3. Compress, then save the new JPEG to Photos or share it to another destination.
COMPRESS PDFS
1. Choose one PDF from Files, up to 50 pages and 100 MB.
2. Review the flattening disclosure.
3. Choose a maximum from 10 KB to 100 MB.
4. Compress, then share or save the new PDF copy to Files.
UnderLimit measures the finished copy on disk before it says the result is under your limit. Your original image or PDF is never modified. If a PDF cannot reach the requested limit without going below UnderLimit's legibility floor, the app reports an honest target miss instead of producing a misleading result.
PDF OUTPUT
PDF compression creates a new flattened visual copy. It keeps the page appearance but removes searchable text, links, forms, annotations, and other interactive behaviour. Signed and encrypted PDFs are rejected.
PRIVATE BY DESIGN
Processing happens on your iPhone. UnderLimit has no account, advertising, analytics, tracking, cloud processing, or third-party SDK. It does not collect your photos, PDFs, files, usage, or diagnostics.
UnderLimit uses app-private temporary working copies and cleans them when the session ends. Launch cleanup removes abandoned session files. You decide when and where to export the finished copy.
CURRENT VERSION
UnderLimit handles one image or one PDF at a time. Image input accepts JPEG, HEIC, and PNG and exports JPEG. PDF input comes from Files and exports a flattened PDF copy. Video and batch compression are not included.
One honest purchase. No subscription and no usage quota.
