Is MediaCC really free to use?

Yes. MediaCC is completely free with zero subscription fees. Per W3C WebAssembly specification, all processing runs client-side—no server costs. No registration or account required. Batch processing: up to 15 files per session, 1000MB total limit.

Are my files uploaded to any server?

No. Your files never leave your device. According to WebAssembly design, MediaCC runs Canvas API (images) and FFmpeg.wasm (video) entirely in-browser. 100% privacy—no upload, no cloud, no third-party access. Per W3C specification, client-side processing eliminates server-side data exposure risks.

What image formats does MediaCC support?

MediaCC supports HEIC, HEIF, JPG, PNG, WebP, and AVIF. HEIC (iOS photos) is decoded client-side via heic2any. Per our tests: single file up to 150MB; batch of up to 15 files (1000MB total); lossless compression ~10% size reduction; lossy ~50% with acceptable quality.

What video formats does MediaCC support?

MediaCC supports MP4, WebM, MOV, MKV, and AVI. FFmpeg.wasm (libx264, AAC) runs in-browser. Compression: lossless CRF 18; lossy CRF 28 with 1Mbps video / 128kbps audio limits. Features: bitrate adjustment, frame extraction, audio extraction to MP3. Large files (50MB+): processing typically 20–45 minutes depending on length.

Are my images uploaded to a server?

No. All conversion and compression runs locally via Canvas API, heic2any (for HEIC), and WebAssembly. Your files never leave your device—zero upload, 100% privacy.

Is MediaCC Image Converter free to use?

Yes. MediaCC is completely free with no registration, no account, and no usage caps. Zero hidden fees, no watermarks. All features—including batch processing of up to 15 files—are included.

What image formats are supported?

MediaCC supports HEIC, HEIF, JPG, PNG, WebP, and AVIF. HEIC (iOS photos) is decoded client-side via heic2any. Convert between formats and compress up to 150MB per file. Lossless ~10% reduction; lossy ~50% with acceptable quality.

What is the maximum file size for image conversion?

Single file limit: 150MB. Session limit: 1000MB total across up to 15 files. For best performance, we recommend files under 50MB each.

How does browser-based image processing work?

MediaCC uses Canvas API and browser-image-compression. HEIC uses heic2any for client-side decoding. All processing runs in JavaScript/WebAssembly—no server requests. Images are processed and exported locally.

Can I batch convert multiple images at once?

Yes. You can process up to 15 images per batch with a 1000MB total limit. Files are processed sequentially to avoid memory issues and ensure stable operation.

Will image quality be affected during conversion?

You control output quality. Use the quality slider (default 92% for JPEG/WebP). Lossless conversions (e.g., PNG) retain full quality. Lossy compression lets you balance size vs. quality.

MediaCC

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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
Supports HEIC, JPG, PNG, WebP, AVIF and more

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

Drag and drop image files here

Or click the button below to select files

Select Files

100% local processing, files are not uploaded to server

Supported Image Formats

JPG/JPEG/PNG/GIF/WebP/HEIC/AVIF/BMP/TIFF

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, AVIF, HEIC, GIF, BMP, TIFF	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

MediaCC

100% local — files never uploaded

Typical Cloud Tools

Files uploaded to remote servers

Who Should Use

Use MediaCC for sensitive or confidential images

Account / signup

MediaCC

No account required

Typical Cloud Tools

Often free tier with limits; paid plans for volume

Who Should Use

MediaCC for quick, anonymous one-off tasks

Batch processing

MediaCC

Up to 15 files per session

Typical Cloud Tools

Varies; many limit free batch size

Who Should Use

MediaCC when processing multiple files at once locally

HEIC / iPhone photos

MediaCC

Native HEIC support in-browser

Typical Cloud Tools

Supported on some sites (e.g. CloudConvert, Convertio)

Who Should Use

MediaCC if you want HEIC handled without uploading

Compression quality

MediaCC

Lossless & lossy modes; good for everyday use

Typical Cloud Tools

Often stronger algorithms & tuning (e.g. TinyPNG, Squoosh)

Who Should Use

Try TinyPNG or Squoosh when maximum compression ratio matters

Format coverage

MediaCC

JPG, PNG, WebP, AVIF, HEIC, GIF, BMP, TIFF

Typical Cloud Tools

Broader exotic formats (RAW, PSD, etc.) on CloudConvert

Who Should Use

CloudConvert / Convertio for rare or professional formats

Speed (large files)

MediaCC

Limited by device CPU/RAM

Typical Cloud Tools

Server-grade hardware; often faster for huge files

Who Should Use

Cloud tools when local browser runs out of memory

Watermarks / fees

MediaCC

Free, no watermarks

Typical Cloud Tools

Free tiers may have limits, ads, or watermarks

Who Should Use

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 bitrate/resolution sliders (VEED, Clideo for video)
•Desktop batch workflows with CLI (HandBrake for video)

Detailed Usage Guide

How to Use

1. Format Conversion

Supported formats: JPG/JPEG, PNG, GIF, WebP, AVIF, HEIC, BMP, TIFF
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
Lossless compression: Maintains original quality while optimizing file size (approximately 10% reduction)
Lossy compression: Balances quality and file size, significantly reducing file size (approximately 50% reduction)
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
Other formats: Canvas API loads image, draws to canvas, exports via toBlob()
For JPEG and WebP, quality parameters can be set (default 92%)
AVIF and other unsupported formats may fallback to PNG or prompt the user

Compression Principle

HEIC source: First converted to JPG/PNG via heic2any, then compressed
Uses browser-image-compression for intelligent compression:
Lossless compression: Maintains original format and quality while reducing file size through optimized encoding parameters
Lossy compression: Adjusts quality parameters (70%) and compression algorithms to maximize compression ratio within acceptable visual quality
Uses Web Worker for background thread processing without blocking the main interface
Automatically maintains original resolution without changing image dimensions

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.

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