Can I use my own logo?

Yes. Choose ‘Image or logo’ and upload a PNG, JPG or WebP. A PNG with a transparent background is what you want if the logo is not a rectangle — the transparency is kept, so only the mark itself is drawn onto the photo.

Can I watermark several images at once?

Yes. Upload up to 20 files in one go and the same watermark, position, size and opacity are applied to every one. If you are using a logo it counts as one of those uploads, so one fewer picture than that, plus the logo. Take the results back individually or as a single ZIP.

Which font is the text drawn in?

A single built-in sans-serif, covering Latin, Greek and Cyrillic letters. There is no font picker: one built-in font keeps the result predictable across every image in a batch. If a character cannot be drawn you are told before you download anything.

Why is the size a percentage rather than a pixel size?

Because one setting is applied to every file in the batch. Thirty-six pixels is a headline across a thumbnail and an invisible speck on a 6000-pixel photograph, so a fixed size makes a batch of mixed sizes come back looking inconsistent. A share of each image's width lands the same way on all of them.

Does this change my image in any other way?

No. The dimensions, the format, the colour profile and the transparency are all left as they were, and a photo whose EXIF asks for it to be rotated is turned the right way up first so the watermark lands where you put it. The only change is the mark itself — and the re-compression that drawing it makes unavoidable.

Can the watermark be removed by someone else?

With effort, yes. A watermark is drawn into the picture, so removing it means cropping or painting it out and losing what was underneath. That is enough to discourage casual reuse, which is what watermarking is for; it is not encryption, and nobody should treat it as such.

Is this converter free?

Yes. Every conversion on ConvertNicely is free to use, with no account, no watermark on the result and no limit on how many files you convert.

What happens to my files?

Your uploaded file is deleted from our servers the moment the conversion finishes, whether it succeeded or failed. The converted result is deleted automatically one hour later, and you can delete it yourself at any time with the Delete button.

Is there a file size limit?

Files up to 50 MB are accepted for this conversion. Larger limits apply to paid plans in future, but the free limit is generous enough for the overwhelming majority of JPG conversions.

Do I need to install anything?

No. ConvertNicely runs entirely in your browser and on our servers, so there is nothing to download or install. It works the same on Windows, macOS, Linux, Android and iOS.

Does it work on a phone?

Yes. The whole site is built mobile-first, so you can upload from your camera roll or files app, convert, and download the result without leaving your browser.

Free

Watermark Images

Watermarking is how a photograph stays attributable once it leaves your hands. Type a line of text or upload your logo, put it where you want it, and set how strongly it shows — then apply the same settings to every image in the batch at once. Each file comes back in the format it went in as, the same size it was, the right way up.

Also known as: add watermark to photo · photo watermark

Files up to 50 MBTypically under a minute

Drop your files hereor choose a file from your deviceJPG, PNG, WebP, TIFF, BMP, HEIC or AVIF · up to 50 MB · up to 19 files

Encrypted upload · deleted right after conversion

Your files are deleted automatically

Uploads are removed as soon as processing finishes, and converted files are deleted after 1 hour. Read our privacy policy.

How to watermark images

Step 1
1. Add your files
Drag up to 19 JPG, PNG, WebP, TIFF, BMP, HEIC or AVIF files into the box, or choose them from your device. Each can be up to 50 MB.
Step 2
2. Choose your settings
Fill in “Watermark text”. Adjust Watermark (Text), Text size (10% of width), Text colour (White), Position (Centre), Opacity (50%) and Rotation (0°), or keep the starting values in brackets, which suit most files. Some choices show further settings. The preview shows how it will look before you start. If you choose “Image or logo”, also add the watermark image (PNG, JPG or WebP).
Step 3
3. Press Add watermark
The work happens on our servers, and you can follow its progress.
Step 4
4. Download the result
Each file comes back in the format it went in; several come together in a ZIP. Your upload is already deleted, and the result is deleted after one hour.

Worth knowing

A watermark is drawn into the pixels, so the file is saved again — which re-compresses a JPG, WebP or HEIC slightly. Your original is never modified. And a watermark discourages casual reuse rather than preventing it: anyone determined enough can crop or paint one out.

Why watermark images?

Marking proofs and previews before a client has paid for them
Putting a studio name or URL across photos going onto social media
Stamping a logo onto a batch of product shots so they all match
Labelling internal screenshots as drafts before they circulate

What changes

What watermark images changes, and what it leaves alone
Property	Before	After
Dimensions	Original	Unchanged
Format	Original	Unchanged
Transparency	Kept where the format allows	Kept
The watermark	None	Text or your logo

Frequently asked questions

Page updated 3 October 2026

All Image converters

Watermark Images

How to watermark images

1. Add your files

2. Choose your settings

3. Press Add watermark

4. Download the result

Why watermark images?

What changes

Frequently asked questions

Resize Image

Compress Image

Remove Image Metadata

JPG to PNG

Watermark Images

How to watermark images

1. Add your files

2. Choose your settings

3. Press Add watermark

4. Download the result

Why watermark images?

What changes

Frequently asked questions

Can I use my own logo?

Can I watermark several images at once?

Which font is the text drawn in?

Why is the size a percentage rather than a pixel size?

Does this change my image in any other way?

Can the watermark be removed by someone else?

Is this converter free?

What happens to my files?

Is there a file size limit?

Do I need to install anything?

Does it work on a phone?

Related conversions

Resize Image

Compress Image

Remove Image Metadata

JPG to PNG