Grayscale Image
Convert images to grayscale or sepia tone with adjustable intensity
Drop images here
Select one or more images
Max file size: 20MB
100% Private: All processing happens in your browser. Your files never leave your device.
Unlike the other single-image editors on this site, Grayscale Image accepts multiple files at once. Drop in a batch, switch between Grayscale and Sepia mode, set an Intensity from 0 to 100% (in steps of 5), then press Apply to run every loaded file through the same settings in one go. A single image gets a live preview canvas; load a second one and the preview disappears, since there’s no longer one clear image to show a preview of.
Results come back as a single direct download when you’ve processed one image, or as a ZIP file (built with the JSZip library, right in your browser) once there’s more than one result to hand back. If one file in a batch fails — typically because it’s too large for the browser to process — it’s skipped and counted rather than stopping the whole run, and you’ll see a message naming how many images couldn’t be converted.
How it works
1. Drop or browse one or more images
Multiple selection is supported here, unlike this site’s other image editors; each file is checked against the same 20 MB cap.
2. Choose Grayscale or Sepia
A toggle switches the effect; changing it clears any results you’d already generated so you always download the mode you last selected.
3. Set the Intensity
The slider runs 0 to 100% in steps of 5, blending between your original colours and the full grayscale or sepia effect rather than being a simple on/off switch.
4. Apply, then download
One result downloads directly; two or more are bundled into a single ZIP file named after the mode you used.
When you'd use it
Converting a whole set of photos for a printed booklet
Load every photo for a black-and-white publication at once and apply the same conversion to all of them in a single pass, rather than one at a time.
A uniform vintage look across an album
Apply Sepia mode with a consistent Intensity to a batch of photos so an entire themed album or scrapbook shares one warm, aged tone.
Simplifying scanned pages before archiving
Strip colour from a batch of scanned documents to keep a consistent, lightweight black-and-white archive rather than storing full-colour scans of text-only pages.
Saving ink on a printed batch
Converting a set of photos to grayscale before sending them to a printer avoids the extra colour-cartridge cost of printing images that don’t need to be in colour.
How batch processing behaves
With one image loaded you get a live preview that updates as you move the mode toggle or Intensity slider. Load a second image and that preview canvas is removed entirely — the tool only shows a live preview when there’s exactly one file in the queue, so with a batch you’re applying settings you can’t see rendered until after you press Apply.
A failed file doesn’t stop the batch: each image is processed inside its own try/catch, so one image that’s too large for the browser to handle is skipped while the rest continue, and the run finishes with a count of how many failed rather than aborting partway through.
Grayscale vs. Sepia, and what Intensity controls
Grayscale removes colour information based on each pixel’s luminance, giving a classic black-and-white result. Sepia instead applies a warm, brownish tint across the image, mimicking the look of an aged photograph. Both modes use the same Intensity slider underneath, and it isn’t a toggle — at 0% your image is untouched, and as you raise it toward 100% the chosen effect blends in more fully, so a partial, subtler conversion is just as easy as a full one.
Frequently asked questions
Can I convert several images at once?
Yes — this is the one editor on the site built for batches. Load multiple files, apply your settings once, and download every result together as a ZIP.
What happens if one image in my batch fails to process?
It’s skipped and counted, while the rest of the batch continues normally. You’ll see a message reporting how many images couldn’t be processed, typically because a file was too large.
Why did my preview disappear after I added a second image?
The live preview canvas only appears when exactly one image is loaded. As soon as you add a second file, the tool switches into batch mode and stops showing a preview.
What’s the actual difference between Grayscale and Sepia?
Grayscale strips colour based on luminance for a black-and-white result; Sepia applies a warm brown tone across the image for a vintage, aged-photograph look.
Does Intensity have to be all the way up?
No. It runs from 0 to 100% in steps of 5, so you can blend a partial effect rather than committing to full grayscale or full sepia.
Is there a file size limit per image?
Yes, 20 MB per file, checked as each one is added to the batch.