Best File Size Reducer App

249+ iOS apps curated and reviewed

4.4 avg rating
20 free apps
Updated September 2026

The best file size reducer app on iPhone average 4.4★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.

Compare top File Size Reducer App (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1PDF Compressor - Reduce SizePDF Compressor - Reduce SizeFree4.3★ (82)NoYesSep 2026
2Compress Photos & PicturesCompress Photos & PicturesFree4.7★ (22K)YesYesSep 2026
3PDF Compressor: Size ReducePDF Compressor: Size ReduceFree4.3★ (57)YesYesSep 2026
4Image Resizer : Resize PhotosImage Resizer : Resize PhotosFree5.0★ (16)YesYesJul 2026
5Video Compressor・Reduce SizeVideo Compressor・Reduce SizeFree4.3★ (313)YesYesSep 2026
6PDF Compressor – Reduce SizePDF Compressor – Reduce SizeFreeNoYesMay 2026
7Video Zip - Crop Movie Maker Compress File SizeVideo Zip - Crop Movie Maker Compress File SizeFree4.2★ (86)NoNoAug 2026
8PhotoSlim - Reduce Photo SizePhotoSlim - Reduce Photo SizeFree4.1★ (65)YesYesSep 2026

Top Picks for File Size Reducer App

PDF Compressor - Reduce Size#1

PDF Compressor - Reduce Size by NextPixel apps

compress & make PDF smaller
Editor's Choice
🔧 Utilities
4.3(82 ratings)
FreeIn-App Purchases
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Reduce the size of your PDF documents without sacrificing quality. Optimize PDFs for storage, sharing, and faster loading. Effortlessly manage and share your compressed files anywhere.

Compress Photos & Pictures#2

Compress Photos & Pictures by New Marketing Lab, Inc

Compress photos, save space
Strong Contender
📷 Photo & Video
4.7😐(22K ratings)
FreeAdsIn-App Purchases
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Reduce the file size of your photos and reclaim storage space on your device. This app offers intelligent compression to maintain image quality while significantly shrinking files for faster sharing and easier storage. It supports various file types and offers advanced tools for privacy and export.

What We Love

  • 👍 Easy to use
  • 🚀 Effective compression
  • 💡 Useful for reducing photo file size
  • 🚀 Fast processing
  • 🚀 Saves a lot of storage space

Room to Improve

  • 🐛 Compression issues (photos look distorted or washed out)
  • 🐛 Crashes or freezes during batch processing
  • 🔍 Difficult to find compressed photos in library
  • 💰 Aggressive ads in free version
  • 💰 Paid version still has ads
PDF Compressor: Size Reduce#3

PDF Compressor: Size Reduce by Hardik Dhameliya

PDF Compress & Reduce Size
Worth Considering
🔧 Utilities
4.3(57 ratings)
FreeAdsIn-App Purchases
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Easily reduce the size of your PDF files with this utility app. It offers a range of tools to compress, edit, and convert PDFs, saving you disk space and improving upload/download speeds. Features include OCR, merging, page removal, and security options.

More File Size Reducer App apps to explore

FAQ about File Size Reducer App

What is the best file size reducer app for iPhone?
PDF Compressor - Reduce Size tops our file size reducer app ranking as of September 2026, with a 4.3-star average from 82 App Store ratings, and it's free to download.
Yes — 20 of the top file size reducer app we rank are free to download, including PDF Compressor - Reduce Size and Compress Photos & Pictures.
PDF Compressor - Reduce Size has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 249+ file size reducer app on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
PDF Compressor uses advanced compression algorithms to reduce the size of your PDF files. It aims to achieve the smallest possible size without compromising the quality of text, images, and formatting.
Yes, PDF Compressor includes a file management system. You can easily rename, delete, or share your optimized PDF documents directly from within the app.