Bulk Image Compressor: Best Tools for Fast Image Optimization in 2026

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What a Bulk Image Compressor Does

Images are usually the heaviest part of a web page, so large ones slow your site down. A bulk image compressor shrinks a whole set of images in one go, so you don’t have to do them one at a time.

Whether you are a blogger, Web Developer, digital marketer, or beginner building your first website, this guide compares 7 ways to compress images in bulk, with each one’s free limits and file types. For tools that handle one picture at a time, see our wider Image Compressor roundup.

We haven’t lab-tested these tools against each other, so this isn’t a ranking of compression quality. The limits and prices come from each tool’s own site, checked on 7 November 2026, and they can change.

The 7 Tools at a Glance

Tool Runs on Free limit File types Paid option
SaveDelete Web Several at once, 25 MB each JPG, PNG, WebP, GIF, BMP, TIFF, AVIF, HEIC Free
TinyPNG Web, API 20 images, 5 MB each AVIF, JXL, WebP, PNG, JPEG Paid web plans; API has 500 free a month
ImageOptim Mac app No limit listed JPEG, PNG, SVG, GIF Free and open source
ShortPixel WordPress plugin, web 100 credits a month JPG, PNG, GIF, WebP, AVIF, PDF From $8.33/month billed yearly
iLoveIMG Web 30 images, 200 MB per task JPG, PNG, SVG, GIF Paid plans raise it to 120 images, 4 GB
Kraken.io Web, API 20 files a batch, 1 MB each JPEG, PNG and others From $5/month
Compressor.io Web 50 a day, 10 MB each JPEG, PNG, SVG, GIF, WebP $50/year

Why You Need a Bulk Image Compressor

A bulk image compressor reduces file size across a whole folder, usually with little visible change.

Key benefits:

  • Faster website loading speed
  • A better page experience, which can help your SEO Rankings
  • Less storage and bandwidth used
  • Far less time spent than compressing images one by one

Top 7 Bulk Image Compressor Tools for 2026

1. SaveDelete – Free, With Exact Target Sizes

This is our own free tool, so weigh that as you read this list. You add several images at once and compress them all with one setting.

Key features:

  • Takes JPG, PNG, WebP, GIF, BMP, TIFF, AVIF and HEIC files, up to 25 MB each
  • Saves as JPEG, PNG, WebP or AVIF
  • Compress to an exact size, such as 100KB, for every image in the batch
  • Beginner-friendly interface, with no sign-up
  • Processed on our server; compressed copies deleted about an hour later

SaveDelete suits bloggers and small businesses who want a quick batch without installing anything. Your images do go to our server, so use a desktop tool for private files.

Best for: Beginners and non-technical users

2. TinyPNG / TinyJPG

TinyPNG is a long-running web compressor with a simple drag-and-drop page.

Key features:

  • Up to 20 images at a time on the free page, 5 MB each
  • Compresses and converts AVIF, JXL, WebP, PNG and JPEG
  • Drag-and-drop interface
  • Developer API with 500 free compressions a month

The 5 MB limit can rule out large camera photos unless you pay for a Web Pro or Web Ultra plan.

Best for: Bloggers and developers

3. ImageOptim (Desktop Tool)

ImageOptim is a free, open source Mac app that compresses images offline. It needs macOS 11 or later.

Key features:

  • Works offline, so nothing is uploaded
  • Keeps image quality by default, with optional lossy compression for smaller files
  • Handles JPEG, PNG, SVG and GIF
  • Removes metadata such as GPS position and camera serial number

If you often need to compress images in bulk without using the internet, this is the one to try on a Mac.

Best for: Mac users

4. ShortPixel Image Optimizer

ShortPixel is best known as a WordPress plugin that compresses your Media Library in bulk.

Key features:

  • 100 free credits a month, with unlimited plans from $8.33 a month billed yearly
  • Lossy, Glossy and Lossless modes
  • Handles JPG, PNG, GIF, WebP, AVIF and PDF files
  • Converts images to WebP and AVIF

It compresses images directly from your WordPress dashboard, but a large existing library will use up the free credits quickly.

Best for: WordPress website owners

5. iLoveIMG

iLoveIMG is a set of online image tools, with compression as one of them.

Key features:

  • Up to 30 images and 200 MB per task for free
  • Paid plans raise that to 120 images and 4 GB
  • Compresses JPG, PNG, SVG and GIF
  • Other tools alongside it, including resize, crop and convert

It lists no WebP compression on its compress page, so convert those files first or pick another tool.

Best for: Casual users and beginners

6. Kraken.io

Kraken.io is aimed at developers and busy sites, with an API alongside its web tool.

Key features:

  • Free web tool takes 20 files a batch, up to 1 MB each
  • Pro raises that to 32 MB, with resizing and format conversion
  • Lossy, lossless and expert modes
  • Paid plans from $5 a month for 500 MB of images

The 1 MB free limit is small, so it's more useful once you're on a paid plan.

Best for: Professionals and agencies

7. Compressor.io

Compressor.io is a simple web tool with lossy and lossless modes.

Key features:

  • Handles JPEG, PNG, SVG, GIF and WebP
  • Free for up to 50 compressions a day, 10 MB each
  • Pro costs $50 a year, for 20 MB files and unlimited compressions
  • Says uploads are deleted after compressing

Quality controls and resizing are on the Pro plan.

Best for: Small websites and freelancers

Batch Compressing on Your Own Computer

Online tools are the quickest option for a one-off batch, but if you compress images every week, or the files are private, desktop software you may already own can do the whole folder offline, with no upload limits.

  • Lightroom Classic: select the photos, choose Export, and set the JPEG quality — or tick Limit File Size To and enter a size in KB. Every selected photo is exported in one run.

  • Photoshop: File → Scripts → Image Processor takes a whole folder, resizes each image to fit the dimensions you set, and saves it as a JPEG at the quality you choose.

  • Affinity Photo: File → New Batch Job applies the same output format, quality and size to a list of files.

  • GIMP: has no batch export of its own; the free BIMP (Batch Image Manipulation Plugin) adds it, including resize and JPEG quality.

  • Preview on a Mac: open several images together, select them all in the sidebar and use Tools → Adjust Size to resize every one in a single step.

Whichever route you take, the settings matter more than the tool: resize very large images (5000px wide and up) before compressing, convert photos to WebP where your site supports it, strip metadata, and keep the originals in case you need to re-export at a different quality.

How to Choose the Right Bulk Image Compressor

When you compare tools, check these points:

  • File size limit: a 1 MB or 5 MB limit rules out most camera photos
  • File support: make sure it takes the formats you use, especially WebP and HEIC
  • Batch size: free limits run from 20 to 30 images at a time on the web tools here
  • Where it runs: a web tool is quickest, and a desktop app keeps files on your computer
  • Privacy: check how long uploads are kept before you send anything sensitive

Best Practices for Bulk Image Compression

To get good results, follow these tips:

  • Always keep your original images
  • Choose lossless compression when every detail matters
  • Convert images to WebP where your site supports it
  • Compress images before uploading them to your website
  • Check a few results on different devices before replacing the originals

FAQs – Bulk Image Compressor Tools

1. What is a bulk image compressor?

A bulk image compressor is a tool that compresses multiple images at once to reduce their file size.

2. Can I compress images in bulk without losing quality?

Lossless modes, such as those in ImageOptim, ShortPixel, Kraken.io and Compressor.io, keep the image data intact but save less space. Lossy modes save much more, and the change is often hard to see, so check a few images before you commit.

3. Is bulk image compression good for SEO?

It can help. Smaller images make pages load faster, and page experience is one of many things search engines consider. It won’t fix a page that’s weak in other ways.

4. Are free bulk image compressor tools safe?

Web tools upload your images to their servers, so read the privacy policy before sending anything sensitive. For private files, a desktop tool such as ImageOptim or Lightroom keeps them on your computer.

5. Which bulk image compressor is easiest for beginners?

SaveDelete and iLoveIMG both work in a browser with no setup. SaveDelete also has no sign-up and takes larger files per image than TinyPNG’s free page.

Final Thoughts

Whether you’re managing a blog, an online store, or a portfolio, compressing images in bulk is one of the simpler ways to speed up a site. Start with the file size limit and formats you need, try a free tier on a small batch, and keep your originals.