For iPhone

Make a file fit.Keep it private.

Choose one image or PDF, set the maximum size, and export a verified copy that fits. Your original stays untouched.

Available now on the App Store Buy UnderLimit on the App Store See how it works
Current version 1.1 screens
UnderLimit PDF selection screen explaining private, flattened output Choose a PDF
UnderLimit start screen with separate Images and PDFs choices Images or PDFs
UnderLimit limit screen with custom KB and MB controls Set the limit
Real version 1.1 screens. PDF output is a flattened visual copy; searchable text, links, forms and annotations are removed.

One job, done well

A size limit should not stop you from sending a file.

  1. 01

    Choose a file

    Pick one JPEG, HEIC or PNG image—or one PDF from Files. Your original stays untouched.

  2. 02

    Set the limit

    Use a quick preset or enter the exact maximum your form or email allows.

  3. 03

    Export the copy

    UnderLimit measures the finished JPEG or flattened PDF on disk before you share it.

Current version 1.1

Two file types. One honest size check.

Images

JPEG, HEIC and PNG in.

Choose one image from Photos or Files. UnderLimit exports a verified JPEG copy.

PDFs

One PDF from Files.

Choose a PDF up to 50 pages and 100 MB. UnderLimit exports a flattened visual copy.

Boundaries

Clear when a target cannot work.

Targets run from 10 KB to 100 MB. Signed and encrypted PDFs are rejected, and UnderLimit reports a target miss rather than going below its legibility floor.

Not included: video or batch compression. PDF flattening removes searchable text, links, forms, annotations and other interactive behaviour.

Private by design

Your file stays on your iPhone.

UnderLimit works locally. There is no account to create, no cloud library, and no behavioural tracking built into the app.

No AI services. No online processing. Your image or PDF is handled entirely on your iPhone.

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  • Local processing
  • User-controlled export
  • One-time purchase

A small tool for a familiar deadline

When the upload limit is the only thing in your way.

UnderLimit is available for iPhone as one honest purchase, with no subscription or usage quota.

Buy UnderLimit on the App Store