UnderLimit

Compress Images & PDFs

Only for iPhone

$6.99

iPhone

Choose a precise KB or MB limit. UnderLimit creates verified image or flattened PDF copies that fit—privately on your iPhone, with no subscription. 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.

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UnderLimit now supports PDFs from Files as well as JPEG, HEIC, and PNG images. PDF compression creates a new flattened visual copy. Searchable text, links, forms, annotations, and other interactive behaviour are removed. Signed and encrypted PDFs are rejected. The redesigned PDF start screen makes this boundary clear before you choose a file.

Version 1.1

The developer, Andrew Hazlitt, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Andrew Hazlitt
    Size
    • 2.1 MB
    Category
    • Photo & Video
    Compatibility
    Requires iOS 18.0 or later.
    • iPhone
      Requires iOS 18.0 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2026 Scott Hazlitt
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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