Resize HEIF Images Online by SnapSeek — AI Event Photo Sharing Platform
Resize and scale your HEIF photos quickly without uploading them to any server. Secure, client-side processing with custom dimensions and percentage scaling.
Drag & drop images here
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Size
Framing
Presets
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How to Resize HEIF Photos Online
A fast guide to resize HEIF images on your computer or mobile device.
Select HEIF Files
Drag and drop your HEIF photos into the secure resizer.
Configure Size & Ratio
Input custom pixel width/height or select percentage scaling.
Save Resized Photos
Click Resize Images to generate and download your updated photos.
A Powerful, Private Image Resizer
Scale, crop, and reformat photos instantly without compromising image clarity or user privacy.
100% Client-Side Privacy
Photos are processed locally in your browser using HTML5 Canvas. Your images are never sent to external servers or cloud storage.
Smart Aspect Ratio & Crop
Lock aspect ratio to prevent distortion or choose Crop to Fill (Cover) to perfectly fit dimensions with clean center alignment.
Fast Batch Resizing
Resize multiple high-resolution photos in parallel with zero lag or freezing, and export as a single ZIP file with one click.
Universal Format Support
Seamlessly works with JPEG, PNG, WebP, and Apple HEIC/HEIF files. Export to your desired output format with custom quality.
Standard Image Resolutions & Social Media Specs
Quick reference for the most popular aspect ratios and pixel dimensions across web platforms.
| Platform / Use Case | Optimal Dimensions | Aspect Ratio | Action |
|---|---|---|---|
| Instagram Post (1:1 Square) | 1080 × 1080 px | 1:1 | Resize |
| Instagram Story / Reel / TikTok | 1080 × 1920 px | 9:16 | Resize |
| YouTube Channel Banner | 2560 × 1440 px | 16:9 | Resize |
| Facebook Cover Photo | 820 × 312 px | 2.6:1 | Resize |
| LinkedIn Profile Banner | 1584 × 396 px | 4:1 | Resize |
| Full HD Web Standard (1080p) | 1920 × 1080 px | 16:9 | Resize |
| 4K Ultra HD | 3840 × 2160 px | 16:9 | Resize |
| Passport / Visa Photo (2×2") | 600 × 600 px | 1:1 | Resize |
Frequently Asked Questions
Common questions about online image resizing, aspect ratios, and privacy.
How do I resize HEIF photos?
Upload your HEIF files, specify your target dimensions (or percentage scale), and click Resize Images. The resized HEIF files are prepared locally.
Does resizing preserve HEIF transparency?
JPEG files do not support transparency; padded areas are filled with crisp white backgrounds.
Can I convert to another format while resizing?
Yes, you can choose to keep the original format or export as JPEG, PNG, or WebP with a custom quality setting.