Transform Images
Without Uploading
Compress, resize, and convert HEIC‑first formats (HEIC, PNG, WebP, AVIF) directly in your browser. Zero server uploads. Military‑grade privacy.
Compress HEIC
HEIC hub tool: reduce file size while preserving quality
Resize HEIC
HEIC hub tool: scale images by pixel or percentage
Crop HEIC
HEIC hub tool: trim images to exact aspect ratios
Convert to HEIC
HEIC hub: convert PNG, WebP, AVIF into HEIC
How to Convert Images
Simple, fast, and secure process.
Upload
Drag & drop files or folders (HEIC, PNG, WebP) into the zone.
Adjust
Set quality (0-100%), target size, or resize dimensions.
Convert
Auto-processing starts instantly via WebAssembly engine.
Download
Save individually or download all as a ZIP archive.
Privacy Architecture:
The "Local-First" Difference
Most online converters upload your private files to a remote server. Swift HEIC is different. We engineered a serverless solution using WebAssembly.
Local Processing
Your browser does the heavy lifting using compiled WASM modules. It's faster because there's no upload/download latency.
Zero Server Upload
Check your network tab—files never leave your device. We literally cannot see, store, or share your images.
Offline Capable
Once the page manages to load, you can disconnect Wi‑Fi and continue converting. The app lives in your browser cache.
No Data Retention
There is no cloud storage to hack. Closing the tab instantly wipes all processed data from your browser's memory.
Formats & Compression Deep Dive
JPG / JPEG
The universal standard for photos. Uses lossy compression to significantly reduce file size.
Matches Technical specs
🔬 Compression Science: The "Sweet Spot"
Image compression involves a trade-off between file size and fidelity. When we compress a HEIC, we apply quantization to discard high‑frequency detail that the human eye barely notices.
- Lossless (PNG) Reconstructs original data perfectly. Larger files.
- Lossy (HEIC) Permanently removes data. Smaller files.
- Artifacts Blocky "noise" that appears when compression is too high (< 50%).
- The Sweet Spot 80-85% quality usually offers 70% size reduction with zero visible loss.
📱 Device-Specific Support Guide
🍏 Apple Ecosystem
Challenge
iPhones shoot in HEIC by default since iOS 11.
Solution
Use our HEIC viewer or converter to open and optimize HEIC before transferring to Windows PC or Android devices.
🪟 Windows 10/11
Challenge
Native Photos app often requires a $0.99 "HEIF Extension" from the Microsoft Store.
Solution
Open HEIC here for free in your browser instead of buying the extension.
🤖 Android
Challenge
Sharing high-res WebP or HEIC files via WhatsApp/Telegram can sometimes trigger errors.
Solution
Preview HEIC in the browser and convert only when compatibility requires it. Our tool features a mobile‑responsive UI for Android.
🔧 Troubleshooting & Pro Tips ▼
- • File size surprisingly large? If you convert a simple graphic (like a vector logo) from PNG to HEIC, it might grow in size or look soft due to compression artifacts. Use PNG for graphics, HEIC for photos.
- • Transparency turned black? HEIC may not preserve transparency in some workflows. Use PNG when you need alpha.
- • Corrupted file error? Ensure your original file has a valid header. Renaming a file (like .png to .heic) manually breaks it—always use a real converter.
Real-World Use Cases
Who uses Swift HEIC and why?
Photography Portfolios
Compress high-res shoots for website galleries without losing visual detail.
E-Commerce
Standardize product images to white‑background HEIC or PNG for marketplace requirements.
Web Performance
Convert heavy PNGs to WebP/AVIF to improve Google PageSpeed (LCP) scores.
Documents & Forms
Resize scans to under 200KB for government portals and visa applications.
Social Media
Crop and format landscape photos for Instagram Stories (9:16) or Posts (4:5).
Email Attachments
Compress images to avoid hitting the 25MB attachment limit in Gmail/Outlook.