Bulk Image Processor

Resize, compress and watermark multiple images at once in your browser — free bulk editor.

Operations
Resize

Each image is scaled down to fit inside this box, keeping its aspect ratio. Images already smaller are left alone.

Compress / convert format

About

About the Bulk Image Processor

Runs any combination of resize, compress and text watermark over a whole batch of images at once, entirely in your browser.

Online sellers and bloggers use it to shrink and watermark an entire product or gallery shoot before publishing, while anyone clearing out a phone's camera roll uses it to resize hundreds of photos down to a sane file size in one go. It's one of many free image tools on Toolapt, and like every tool here, it's free to use with no sign-up and no limit on how many images or batches you run through it.

Choose what to view about this tool

Guide

Using the Bulk Image Processor

  1. 1

    Step 1

    Add one or more images — click the dropzone to browse, or drag and drop files onto it.

  2. 2

    Step 2

    Tick which operations you want: Resize, Compress / convert format, and/or Add text watermark.

  3. 3

    Step 3

    Set the options for each operation you ticked — max width/height, output format and quality, or watermark text, position, size, opacity and colour.

  4. 4

    Step 4

    Click "Process images" to run every ticked operation on every file, entirely in your browser.

  5. 5

    Step 5

    Download a single result with its own Download link, or click "Download all as ZIP" to get every result in one file.

  • Handles a whole batch of images at once — add files across several picks or drops and they all stay in one list
  • Three operations you can mix and match freely: resize to a max width/height, compress/convert to JPEG, WebP or PNG at a chosen quality, and stamp a text watermark
  • Watermark text is placed at any of five positions (corners or center), with adjustable size, opacity and colour
  • Shows a before/after file size and a total reduction percentage across the whole batch once processing finishes
  • Every result gets its own download link, plus a one-click "Download all as ZIP" for the whole batch
  • Works entirely in your browser — no installs, no sign-up, and no image is ever uploaded anywhere
  • Free to use, with no limit on how many images or batches you process

Online sellers

Online sellers use the Bulk Image Processor for resizing and watermarking a whole batch of product photos before uploading them to a marketplace or store.

Bloggers and content creators

Bloggers and content creators use the Bulk Image Processor for shrinking a gallery of photos down to a web-friendly file size before publishing a post.

Anyone tidying up photos

Anyone tidying up photos uses the Bulk Image Processor for resizing or compressing a folder of camera-roll images down to a smaller, more manageable size.

Photographers

Photographers use the Bulk Image Processor for stamping a copyright watermark across an entire shoot before sharing low-resolution previews with a client.

Examples

Bulk Image Processor examples

2 worked examples

01

A product photo batch

12 product photos at 2000×1500 resized to a 1600px max (so 1600×1200), saved as JPEG at quality 85 and watermarked "© Brightleaf Store" — all in one pass, then downloaded together as a 2.40 MB ZIP.

02

A camera-roll cleanup

20 full-resolution camera photos (35.86 MB) converted to WebP at quality 75 with resizing switched off come out at 10.95 MB — about 69% smaller in total.

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FAQ

Frequently asked questions

Quick answers to common questions about the Bulk Image Processor.

What does the Bulk Image Processor do?

It runs any combination of resize, compress/convert and text watermark over a whole batch of images in one pass, then lets you download each result or all of them together as a ZIP.

Is the Bulk Image Processor free to use?

Yes. It's free, with no sign-up, no account and no limit on how many images or batches you process.

Are my images uploaded anywhere?

No. Every image is read and processed locally on your own device using your browser's canvas — nothing is ever sent to a server, even when you download everything as one ZIP.

Can I apply only one operation, like just resizing?

Yes. Untick "Compress / convert format" and "Add text watermark" and only "Resize" will run — or untick all three operations you don't need.

What image formats can I output?

JPEG, WebP or PNG. If "Compress / convert format" is left unticked, results are saved as PNG so no quality is lost.

How does the ZIP download work?

Once at least two images have been processed, a "Download all as ZIP" button appears. It loads a small, well-known open-source ZIP-building library from this site the first time you use it, then builds the ZIP file locally in your browser before you download it.

Can I use the Bulk Image Processor on my phone?

Yes. The page is fully responsive and works on mobile, tablet and desktop browsers alike.

Does the Bulk Image Processor have any limitations?

Very large batches or very large individual images take longer and use more memory since everything runs in your browser tab. For most everyday batches of photos it's fast and instant.

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