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Free · Runs in your browser
Compress images in bulk

A free bulk image compressor to shrink whole folders at once

Drop a whole folder and let this bulk image compressor compress images in bulk in seconds. Tune one quality slider, watch every file get smaller, and download them one by one or as a ZIP. Your pictures never leave your browser — there is no upload and no sign-up.

Compress images nowHow it works

Drop images here or click to browse

Add as many images as you like — JPG, PNG, WebP, GIF

100% private — your images are processed in your browser and never uploaded.

How to compress images in bulk in three steps

This bulk image compressor turns a heavy folder of photos into lightweight files without any software install. The whole flow to compress images in bulk happens on this one page, right inside your browser.

  1. 01

    Add your images

    Drag a whole folder onto the bulk image compressor, or click to browse and pick the files you want to compress. Add as many images as you like — JPG, PNG, WebP, and GIF frames are all welcome, and nothing is uploaded anywhere.

  2. 02

    Pick a quality level

    Choose JPG or WebP for the smallest files, then drag the single quality slider. The bulk image compressor applies that one setting to every image, so you compress images in bulk with consistent quality instead of tuning each photo by hand.

  3. 03

    Download the smaller files

    Hit process and the tool will compress images in bulk locally, showing the new size and the percentage saved on each one. Download a single file or grab the whole batch as a ZIP — the compressed images are ready to ship.

A bulk image compressor built to save real bandwidth

Stop compressing one photo at a time. Describe nothing, configure once, and compress images in bulk so a folder that was tens of megabytes ships as a fraction of the size.

One slider, every file

Set the quality once and the bulk image compressor reuses it across the batch. That is the whole point of a bulk image compressor: you compress images in bulk with one decision instead of repeating the same export dozens of times.

JPG, WebP, or PNG out

Compress images to a smaller JPG, switch to modern WebP for even lighter pages, or keep PNG when you need it. Every file in the batch comes out in the format you picked, already compressed and renamed.

Private by design

This bulk image compressor runs entirely in your browser with the Canvas API. Your images are never uploaded to a server, so you can compress images in bulk even when they are private, sensitive, or unreleased.

Who reaches for a bulk image compressor every week

Anyone shipping a lot of pictures wants to compress images in bulk before they go live, so pages stay fast and storage stays cheap.

Web & store owners

Compress product photos and hero images so pages load fast and Core Web Vitals stay green. A bulk image compressor lets you compress images in bulk for a whole catalog the moment new shots come in.

Bloggers & marketers

Compress images in bulk before uploading to a CMS so every post stays light. One pass through the bulk image compressor and a month of screenshots is ready to publish.

Developers & designers

Compress images in bulk to trim app bundles, email assets, and design exports. Keep the originals, ship the compressed copies, and let the bulk image compressor handle the repetitive part.

Bulk image compressor questions

More questions? Email us at support@bulkimagen.com

  • A bulk image compressor is a tool that shrinks many pictures at once instead of one at a time. You add a folder, choose a quality level, and it will compress images in bulk into smaller files you can download together.
  • Add your files above, pick JPG or WebP, drag the quality slider, and press process. This free bulk image compressor will compress images in bulk right away and let you download every result as a ZIP.
  • No. This bulk image compressor works entirely in your browser, so the files you compress never leave your device. That makes it safe to compress images in bulk even when they are private or unreleased.
  • You can compress JPG, PNG, WebP, and GIF frames. The bulk image compressor outputs JPG or WebP for the smallest files, or PNG when you need lossless, so you compress images in bulk into whatever format your project expects.
  • It depends on the photos and the quality you choose, but most JPGs and screenshots get dramatically lighter. The tool shows the saving on each file as it compresses images, so you can dial the slider until the batch looks right.
  • JPG and WebP are lossy, so very low quality settings soften detail. The bulk image compressor keeps a sensible default and a live size readout, so you can compress images in bulk while keeping quality where you want it.
  • There is no hard cap built into the tool. Because everything runs locally, the practical limit is your device's memory, so you can compress images in bulk in big batches and just split very large folders if needed.
  • Yes. The bulk image compressor works in any modern mobile browser, so you can compress images in bulk from a phone or tablet without installing an app.
  • No sign-up and no install. Open the page, drop your files, and the bulk image compressor lets you compress images in bulk straight away — it is genuinely free to use.
  • Yes. The bulk image compressor never overwrites anything on your disk; it creates new compressed copies you download, so your originals stay exactly as they were while you compress images in bulk.

Need to create images too, not just compress them?

When you are done here, BulkImagen can generate fresh images in bulk from a single prompt with credits — the same batch mindset, applied to AI image generation. Compress what you have, then create what you need.

Try bulk AI generation