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Photo & Video

Synology Image Assistant Ext.

By Synology Inc.

A Safari extension that assists with HEIF/HEVC viewing and thumbnail generation alongside Synology's desktop utility.

View on the App Store Official website
Our take

Install it only if the matching utility and permissions fit your workflow.

It supports a specific image/video viewing task rather than general browser editing.

Keep in mind: Requires the separate desktop utility, macOS 12.3+ and Safari 15.4+ per description; check exact extension access before enabling.

What you can do

  • Work with listed HEIF/HEVC files
  • Assist generation of JPEG thumbnails
  • Use the Safari extension with its desktop companion

App Store review themes

Recurring praise and complaints, grouped by topic.

3 reviews · US App Store · Written feedback; review platforms are not identified

What reviewers like

No recurring positive theme has at least three supporting reviews.

What reviewers dislike

No recurring negative theme has at least three supporting reviews.

Good for

  • Synology users who need the stated browser-format support.

Consider alternatives for

  • Users seeking a standalone converter or unwilling to grant required extension permissions.

Limitations & considerations

  • Captured minimum: macOS 12.3.
  • Requires the separate desktop utility, macOS 12.3+ and Safari 15.4+ per description; check exact extension access before enabling.

Privacy & permissions

Review Safari's actual website-access prompt and desktop utility handling; image rendering does not require assuming all browsing access is safe.

Sources & review notes Updated Nov 11, 2026

Reviewed by iApp4Me Editorial Team. Recommendations use the linked documentation and attributed accounts; device observations are identified separately.

  1. US App Store developer description

    Complete description, download price and compatibility metadata captured 2026-11-02.

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Review themes: 3 US App Store written reviews, updated Apr 22, 2026–Jul 20, 2026. Collected Nov 6, 2026.

Review sources & grouping details

These themes use the completed local review collection and Codex analysis: the latest accessible written reviews within one year, up to 500 per app. This is an accessible sample, not a guarantee of all reviews or a measure of all users.

The feed does not identify each review’s platform. Its date is an update timestamp and may reflect an edited review. Versions shown belong to individual reviews; reported limitations are not verified current-version behavior.

Codex grouped explicit opinions from the review text, with original-text evidence retained. Counts use distinct review IDs, independently of star rating. A review may appear in several topics. The three most-mentioned topics per side are shown first; where more are available, expand the list to see every topic supported by at least three reviews. Group summaries describe recurring aspects across the group; individual examples retain their own context and do not stand in for the whole group. 2 reviews were too general, unclear or off-topic to assign a specific theme. Example summaries are paraphrases; the labeled excerpts are original review text. Analysis updated Nov 10, 2026.

  1. Apple US review feed — page 1.