Downsize: Video Compressor

Compress Video & Photo by MB

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Compress any video or photo to a target size in seconds — 100% on your iPhone. No uploads, no account, no quality surprises. Hit 10, 25 or 50 MB every time. Downsize shrinks your videos and photos to fit any size limit — email attachments, WhatsApp, Discord, upload forms — without killing the quality. Set a target like 25 MB and Downsize does the math for you: it picks the right bitrate, compresses, then checks the real file size and automatically tries again if it's still too big. You get a file under your limit. Every time. Everything runs 100% on your iPhone. Your videos and photos never leave your device — no uploads, no cloud, no account, no waiting on a server. COMPRESS TO AN EXACT SIZE • Pick a target: 10 MB, 25 MB, 50 MB, or your own custom limit • Guaranteed under your target — we measure the output and re-compress if needed • See the estimated size before you start BUILT FOR QUALITY • Modern HEVC (H.265) encoding — same quality at a smaller size • H.264 option for maximum compatibility • Choose resolution, bitrate and frame rate yourself in Expert mode • Proper HDR & Dolby Vision handling — tone-mapped to SDR so your video never comes out washed out PHOTOS TOO • Compress photos to HEIC or JPEG • Control quality and target size • Smart downscaling keeps images sharp BATCH CLEANUP • Select many videos at once and compress them in one queue • Review before and after side by side • Free up storage: keep the smaller copy and remove the original — only when you confirm YOUR ORIGINALS ARE SAFE • Downsize always creates a copy first • Nothing is deleted or overwritten unless you explicitly say so WHY DOWNSIZE • Private by design — fully offline, nothing uploaded • No subscription — pay once, keep it forever • Fast native compression using Apple's own video engine • Clean, simple interface Download Downsize and stop fighting with "file too large" errors. — Free: unlimited single-file compression, preset target sizes (10/25/50 MB). Downsize Pro (one-time purchase): batch compression, custom target sizes, expert controls (resolution / bitrate / frame rate / codec) Privacy Policy: https://yyds2327146024.github.io/doc/dsprivacy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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The developer, 邦忠 肖, 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

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    Information

    Seller
    邦忠 肖
    Size
    1.8 MB
    Category
    Utilities
    Compatibility
    Requires iOS 16.0 or later.
    • iPhone
      Requires iOS 16.0 or later.
    • Mac
      Requires macOS 13.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English and 8 more
    • English, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 xiaobangzhong
  • Privacy Policy

    • More by 邦忠 肖

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