Image Compressor

Compress multiple JPG, PNG, WebP, AVIF, GIF, BMP, TIFF, and HEIC images in one batch

Drag and drop your images here

or choose images from your device

Choose Images

Supported formats: JPG, JPEG, PNG, WebP, AVIF, GIF, BMP, TIFF, HEIC (up to 100 images per batch)

How to use Image Compressor

1Select or drag and drop multiple images (JPG, PNG, WebP, AVIF, GIF, BMP, TIFF, HEIC) into the upload area — up to 100 images per batch.
2Adjust the target reduction slider between 10% and 80% to balance file size savings and visual fidelity.
3Click 'Compress Images' to run the fast in-browser queue.
4Review before-and-after file sizes, space saved, and download images individually or packaged into a single ZIP archive.

Key Features & Highlights

•Batch processing for up to 100 images in a single session
•100% private and client-side — your photos never leave your device
•Supports 9 image formats: JPG, JPEG, PNG, WebP, AVIF, GIF, BMP, TIFF, and HEIC
•Smart iterative quality optimization to match target size
•Preserves PNG alpha transparency and respects camera EXIF orientation
•Client-side Apple HEIC (iPhone) and desktop TIFF decoding
•One-click ZIP archive creation with zero external server dependencies
•Controlled concurrency queue prevents browser lag and memory exhaustion

Free Bulk Image Compressor

BrivTools Image Compressor is a comprehensive, high-performance web utility built for developers, designers, photographers, and content creators who need to reduce image file sizes quickly and securely. Operating entirely within your web browser using HTML5 Canvas, WebAssembly, and client-side decoders, the tool shrinks heavy images without uploading a single byte to external cloud servers.

Compress Multiple Images at Once Across 9 Formats

Unlike conventional online image compressors that restrict you to uploading photos one by one or limit you to JPG and PNG only, this tool is designed specifically for batch workflows across all major web, mobile, and print formats. You can select or drag and drop up to 100 images in one batch, including:

Web Standards: JPG, JPEG, PNG, WebP, and next-gen AVIF
Mobile Photos: Apple iPhone HEIC and HEIF camera pictures
Graphic & Print Formats: Uncompressed BMP, animated/static GIF, and high-resolution TIFF

Each file is evaluated independently through a controlled concurrency queue. This ensures that heavy photography batches do not overwhelm your computer's memory or freeze the user interface. Once processing completes, you can download images individually, trigger an automated sequential download, or package the entire batch into a clean, uncompressed ZIP archive.

How to Compress Images

Add Images: Click "Choose Images" or drag files directly onto the drop zone. You can select up to 100 JPG, PNG, WebP, AVIF, GIF, BMP, TIFF, or HEIC files.
Set Target Reduction: Use the slider to specify how aggressively you want to reduce file sizes, from 10% (subtle compression with maximum visual fidelity) up to 80% (compact files for fast mobile web delivery).
Start Compression: Click "Compress Images". The progress bar tracks batch status in real time while individual table rows display processing state.
Export Results: Inspect the compression summary (total original size, total compressed size, and space saved). Download individual files or grab the entire batch via "Download ZIP".

Supported Format Comparison & Optimization

Format	Type	Transparency	Optimization Strategy
JPEG / JPG	Lossy (DCT)	No (White Fill)	Iterative quality encoding with EXIF orientation preservation
PNG	Lossless / Filtered	Yes (Alpha Channel)	Metadata strip, lossless deflate, adaptive dimension scaling
WebP	Lossy & Lossless	Yes (Alpha Channel)	Modern predictive encoding with alpha channel support
AVIF	Next-Gen (AV1)	Yes (Alpha Channel)	Ultra-high compression efficiency with browser encoding fallback
HEIC / HEIF	High Efficiency	Yes	Decoded in-browser via client-side WebAssembly, encoded to compact JPG
TIFF	Uncompressed / LZW	Yes	Decoded in-browser via UTIF, converted into optimized web format
BMP	Raw Bitmap	No	Converted to web JPEG/PNG, delivering massive 80% to 95% space reduction
GIF	Palette / Indexed	Yes	Re-encoded through canvas to condensed web asset

How Image Compression Works

Digital images store color and intensity values across a grid of pixels. In uncompressed or high-bitrate formats, photographs contain subtle color variations and redundant metadata that human eyes cannot readily perceive. Image compression algorithms reduce storage overhead through two primary methods:

Lossy Compression (JPEG, WebP, AVIF): Utilizes Discrete Cosine Transforms (DCT) or predictive coding to discard imperceptible high-frequency color variations and metadata, achieving 50% to 80% size reductions with minimal visible difference.
Lossless Compression & Optimization (PNG, GIF): Uses DEFLATE and spatial filtering to condense repetitive patterns without altering pixel values. For large graphics, slight resolution tuning can be applied while keeping 100% of the alpha transparency intact.
Format Modernization (BMP, TIFF, HEIC): Uncompressed bitmaps and print TIFF files carry massive uncompressed pixel data. By decoding and converting them to optimized web formats, file sizes shrink by up to 90% without visible degradation.

Reduce Image File Size Without Unnecessary Quality Loss

Aggressive compression can cause banding, block artifacts, and blurred text edges. Our engine implements smart iterative quality searches that measure the resulting compressed blob after each pass. It adjusts encoding parameters to meet your target reduction without dropping below a strict visual quality floor (quality setting 0.20). If an image has already been heavily compressed by your camera or graphics editor, the engine prevents file inflation and preserves the best achievable result.

Is Image Compression Safe and Private?

Yes, completely. Many commercial compression services upload your private photos to remote cloud servers for server-side processing. BrivTools Image Compressor executes 100% inside your local browser sandbox using standard web standards (HTML5 Canvas, Blob, and client-side decoders). Your images, confidential documents, and personal iPhone photos never leave your device, ensuring total privacy and compliance with enterprise data security standards.

Explore Related Developer & Converter Tools

Need to convert or extract assets from other media formats? Check out our other client-side utilities:

WebP to GIF Converter — Convert static and animated WebP images to GIF directly in your browser.
PDF Image Extractor — Extract and download embedded image files from PDF documents.
PDF to Markdown Converter — Transform PDF reports into structured Markdown tables and headings.
Website Image Scraper — Extract all image assets and URLs from any public web page.

Frequently Asked Questions

Which image formats can I compress with this tool?

The tool supports 9 formats: JPG, JPEG, PNG, WebP, AVIF, GIF, BMP, TIFF, and HEIC (Apple iPhone camera photos). All processing occurs directly in your browser.

Can I compress iPhone HEIC and HEIF photos?

Yes! The compressor includes in-browser client-side HEIC decoding. You can drag and drop your iPhone photos directly into the tool, and they will be compressed into universal, high-quality web images.

Can I compress uncompressed BMP and desktop TIFF images?

Yes. BMP and TIFF files contain massive uncompressed pixel streams. The compressor decodes them locally and encodes them into compressed, web-ready files, commonly achieving 80% to 95% file size savings.

Does compressing PNG images preserve transparency?

Yes. PNG and WebP compression preserves full alpha channel transparency. For formats that do not support transparency (like JPEG), transparent pixels are safely composited to clean white.

How do I compress multiple images at once?

Select up to 100 images across any supported format using the file picker or drag and drop. Set your target reduction percentage, then click 'Compress Images'. You can download files individually or bundle them all into a single ZIP file.

Are my photos uploaded to any remote server?

No. All image compression, decoding, and ZIP archiving happens 100% client-side inside your browser. Your images and documents never leave your computer or phone.

What is the maximum number of images I can compress in one batch?

You can process up to 100 images per batch. If you attempt to add more than 100 files, the tool gracefully limits the batch to 100 and alerts you without crashing or freezing.

Can I download all compressed images as a ZIP file?

Yes. Once compression completes, click 'Download ZIP' to bundle all compressed images into a single ZIP archive created instantly in your browser with zero server uploads.