Free Online Image Converter & Compressor
MediaCC Image Converter is a tool that lets you convert and compress images directly in your browser. No file upload, no server processing, and no privacy risk. Your files never leave your device.
Why Choose MediaCC?
- 100% local processing – files never leave your device
- Free to use, no signup required
- Fast image conversion and compression
- Converts HEIC/HEIF photos and JPG, PNG, WebP images to JPG, PNG, or WebP
How It Works
- Select an image from your device (drag & drop or click to upload)
- Choose output format or compression level
- Download the processed image instantly – all processing happens locally in your browser
Popular image conversions
Drag and drop image files here
Or click the button below to select files
100% local processing, files are not uploaded to server
Supported Image Formats
MediaCC vs Other Online Tools
See how MediaCC compares with typical cloud-based converters and compressors, and when each option makes sense.
| Dimension | MediaCC | Typical Cloud Tools | Who Should Use |
|---|---|---|---|
| Privacy & data flow | 100% local — files never uploaded | Files uploaded to remote servers | Use MediaCC for sensitive or confidential images |
| Account / signup | No account required | Often free tier with limits; paid plans for volume | MediaCC for quick, anonymous one-off tasks |
| Batch processing | Up to 15 files per session | Varies; many limit free batch size | MediaCC when processing multiple files at once locally |
| HEIC / iPhone photos | Native HEIC support in-browser | Supported on some sites (e.g. CloudConvert, Convertio) | MediaCC if you want HEIC handled without uploading |
| Compression quality | Lossless & lossy modes; good for everyday use | Often stronger algorithms & tuning (e.g. TinyPNG, Squoosh) | Try TinyPNG or Squoosh when maximum compression ratio matters |
| Format coverage | JPG, PNG, WebP, plus HEIC/HEIF input in supported browsers | Broader exotic formats (RAW, PSD, etc.) on CloudConvert | CloudConvert / Convertio for rare or professional formats |
| Speed (large files) | Limited by device CPU/RAM | Server-grade hardware; often faster for huge files | Cloud tools when local browser runs out of memory |
| Watermarks / fees | Free, no watermarks | Free tiers may have limits, ads, or watermarks | MediaCC for clean, unlimited-feeling free use |
Privacy & data flow
100% local — files never uploaded
Files uploaded to remote servers
Use MediaCC for sensitive or confidential images
Account / signup
No account required
Often free tier with limits; paid plans for volume
MediaCC for quick, anonymous one-off tasks
Batch processing
Up to 15 files per session
Varies; many limit free batch size
MediaCC when processing multiple files at once locally
HEIC / iPhone photos
Native HEIC support in-browser
Supported on some sites (e.g. CloudConvert, Convertio)
MediaCC if you want HEIC handled without uploading
Compression quality
Lossless & lossy modes; good for everyday use
Often stronger algorithms & tuning (e.g. TinyPNG, Squoosh)
Try TinyPNG or Squoosh when maximum compression ratio matters
Format coverage
JPG, PNG, WebP, plus HEIC/HEIF input in supported browsers
Broader exotic formats (RAW, PSD, etc.) on CloudConvert
CloudConvert / Convertio for rare or professional formats
Speed (large files)
Limited by device CPU/RAM
Server-grade hardware; often faster for huge files
Cloud tools when local browser runs out of memory
Watermarks / fees
Free, no watermarks
Free tiers may have limits, ads, or watermarks
MediaCC for clean, unlimited-feeling free use
When MediaCC is the better choice
- •Confidential photos or videos that must not leave your device
- •Quick convert/compress without creating an account
- •Batch processing several files with zero upload wait
- •HEIC photos from iPhone handled entirely on your phone or PC browser
- •You want a free tool with no watermarks and no hidden upload
When a sidebar tool may be worth trying
- •You need maximum compression quality (TinyPNG, Squoosh for images)
- •Rare formats like RAW, PSD, or professional codecs (CloudConvert, Convertio)
- •Very large videos (500MB+) that exceed browser memory (FreeConvert, Media.io)
- •Advanced manual video encoding controls (VEED, Clideo for video)
- •Desktop batch workflows with CLI (HandBrake for video)
Detailed Usage Guide
How to Use
1. Format Conversion
- Reliable output formats: JPG/JPEG, PNG, and WebP. HEIC/HEIF input is converted in supported browsers; AVIF input depends on browser support.
- Select "Convert" operation and choose the target format (e.g., JPG to PNG)
- Click the "Start Processing" button, and the system will complete the conversion locally in your browser
- After conversion, you can directly download the image in the new format
2. Image Compression
- Select "Compress" operation and choose compression mode
- High-quality mode: Prioritizes visual quality while optimizing file size
- Smaller-size mode: Balances quality and file size for stronger compression
- Supports batch processing of multiple image files
3. Batch Processing
- You can upload multiple image files simultaneously
- All files will be processed in queue order
- Each file can be downloaded individually after processing is complete
4. File Size Limits & Notes
- Single file limit: Maximum 150MB per image file
- Total file size limit: Maximum 1000MB total file size per session
- File count limit: Maximum 15 files can be processed simultaneously
- Large file processing warnings:
- Larger files take longer to process; we recommend keeping individual files under 50MB for the best experience
- Files over 100MB may cause processing timeout or browser memory issues
- If processing fails due to large file size, consider compressing the image with another tool first
- Keep the browser tab open when processing large files to avoid interruption from switching tabs
Implementation Principles
Format Conversion Principle
- HEIC/HEIF: Decoded client-side via heic2any (WebAssembly), then output as JPG/PNG/WebP
- JPG, PNG, and WebP: Canvas API loads image, draws to canvas, exports via toBlob()
- For JPEG and WebP, preset quality parameters are used for export
- AVIF input support depends on the current browser; unsupported formats prompt the user instead of being advertised as guaranteed outputs
Compression Principle
- HEIC source: First converted to JPG/PNG via heic2any, then compressed
- Uses browser-image-compression for browser-side compression presets:
- High-quality mode: Keeps visual quality high while applying optimized encoding parameters
- Smaller-size mode: Uses stronger compression settings to reduce file size with acceptable visual quality
- Uses Web Worker for background thread processing without blocking the main interface
- Keeps the original image dimensions unless browser processing requires a compatible fallback
Privacy & Security
All processing happens locally in your browser. MediaCC never uploads, stores, or analyzes your files. Your images stay on your device from start to finish – no server, no cloud, no third-party access.