Watermark Image — Add Watermark Online
Add a text or image watermark to your photos.
Drop your JPG / PNG / WebP / BMP file hereTap to select a file
Supports JPG, PNG, WebP, BMP, up to 50MB
What to do next
Related tools
About Watermark Image
Watermark Image is the kind of utility you bookmark and reach for when you need it. Add a text or image watermark to your photos. It loads quickly, works on any modern browser, and produces a result you can download or copy in a single click.
Watermark Image works well as a bookmarked utility you reach for when you need it. The first visit shows you what the tool does; the second is when you realise it is a low-friction option for the task and worth keeping in your tab list.
Watermark Image parses your file with the HTML5 Canvas API entirely inside the browser, applies the options you selected, and returns a download. The processing has no network step, which means a slow or intermittent connection does not slow down the work — once the page is loaded, only your CPU and RAM are involved.
Architecturally, Watermark Image is a single-page client. The processing layer is the HTML5 Canvas API; the UI is a thin React shell on top. JPG, PNG, WebP, and BMP inputs flow through the engine and the output is returned to the browser as a Blob you can save or copy. The 50 MB cap is the only hard limit and it exists to keep memory usage stable on every device.
A practical note on limits: Watermark Image accepts inputs up to 50 MB per run, and the tool processes one input at a time to keep memory usage predictable. If you ever bump into the ceiling, the cause is the size of the input.
Anyone who works with image editing and conversion on a casual basis — students compiling visual reports, social-media managers sizing posts, bloggers preparing hero images — finds Watermark Image a quick way to get the result. The page loads in under a second, the controls are visible from a single screen, and the result downloads or copies in one click.
Watermark Image returns the result as `{name}-watermarked.{ext}`. If you are running multiple jobs, the output names will not collide as long as the input names differ. You can re-run with different settings as many times as you like; each run produces a fresh file with no caching trickery in between.
Watermark Image is intentionally narrow in what it does, which makes it easy to slot into a longer workflow. Take its output, hand it to whichever next tool fits the job, and Watermark Image stays out of your way until the next time you need it.
The transformation in Watermark Image is deterministic — the same input plus the same options produces the same result every run. That predictability matters when the result has to match an upstream specification or be reproducible later.
Some background on the design choices behind Watermark Image: every option you see on the page is there because a real workflow needs it, and every option that is not shown has been deliberately omitted to keep the common case fast. The bias is toward minimal-but-complete.
Watermark Image produces deterministic output: the same input plus the same options always produces the same result. That predictability matters when the result has to match an upstream specification or be reproducible later.
Tips from users who reach for Watermark Image regularly: process one input first to confirm the settings produce what you expect before committing to a batch; treat the page as the working surface and avoid leaving large jobs running in a backgrounded tab where the browser may throttle JavaScript; and if a particular file fails, check whether the source is intact by opening it in its native viewer — most "tool errors" are actually input errors.
For most failure modes, refreshing the page and re-running the job is enough — the engine has no persistent state to corrupt. If the same input fails twice in a row, the input itself is most likely the problem (a truncated file, an unexpected variant of the format, or a stream the engine does not recognise).
Watermark Image is intentionally narrow in scope so the common case is fast and the result is predictable. If you ever need a variation it does not cover, browse the rest of the catalog — there is a good chance an adjacent tool already exists, and switching between tools is just a matter of opening another tab.
How it works
- 1Open the Watermark Image workspace above. The interface is a single page, so there is nothing to navigate.
- 2Drop a JPG, PNG, WebP, and BMP file onto the upload area, or click to pick one from your device.
- 3Tweak the controls if the defaults are not quite right for your input. The options are kept short and labelled in plain language.
- 4Click to start the job. The engine (the HTML5 Canvas API) processes the input in the page; you can watch the progress indicator until it completes.
- 5Grab the output named `{name}-watermarked.{ext}` as soon as the run completes. You can also copy the result instead of downloading if the next tool in your workflow accepts pasted input.
- 6Repeat the process for additional inputs whenever you need to. The page stays loaded, so subsequent runs are quick.
Common use cases
- Generate a square thumbnail from a wide marketing photo using Watermark Image.
- Compose a mockup banner without bouncing between three different apps.
- Optimise a product photo so it loads quickly on a slow connection.
- Convert a batch of camera files into web-friendly formats.
- Convert a phone screenshot into a CMS-friendly format.
- Produce a printable card from a single source image.
- Strip EXIF data from a photo before posting it publicly.
- Crop an image down to the section you actually want to share.
FAQ
Can I use my own logo as a watermark?
Yes — upload a PNG logo or enter text to use as your watermark.
Can I adjust the opacity?
Yes — use the opacity slider to make the watermark more or less transparent.
Where can I position the watermark?
Choose from nine positions (corners, edges, centre) or drag to place it freely.
Does Watermark Image match what professional tools produce?
Watermark Image is built on the HTML5 Canvas API, which is the same class of engine used by professional image editing and conversion pipelines. For deterministic operations, the output is byte-identical to what an equivalent CLI run would produce; for operations involving a codec or a model, the result is well within the range of what comparable tools generate. If you have a specific reference output you need to match, run a small test job first to confirm the configuration produces what you expect.
How often is Watermark Image updated?
Watermark Image is updated whenever the underlying engine releases an improvement or a bug fix. Because the tool is delivered as a static page, every visit fetches the latest version automatically — there is no "version" to manage on your end. If a particular release ever changes default behaviour, the change is documented on Favtoo's changelog so you can confirm what shifted.
What does Watermark Image do that command-line tools do not?
Desktop apps usually have more advanced features but require installation, maintenance and (often) a licence. Paid online tools are convenient but route your file through their servers and gate downloads behind accounts. Watermark Image sits in between: free, instant, and private, but intentionally narrow in scope. For one-off jobs and the common image editing and conversion operations, it is usually the lowest-friction choice; for highly specialised work, a dedicated app is still the right answer.
How fast is Watermark Image?
Most jobs finish in seconds. Speed scales with input size and with how many CPU cycles your browser tab has available — the engine runs in your browser, so it shares resources with whatever else you have open. For inputs near the 50 MB ceiling, expect anywhere from a few seconds to roughly a minute on a typical laptop. Closing other heavy tabs noticeably speeds things up.
Why is my browser prompting me when I open Watermark Image?
Watermark Image only needs the standard web platform — file picker access for the inputs you choose to load, and optionally clipboard access if you copy the result rather than downloading it. There is no microphone, camera, geolocation or background-permission request, because none of those are needed for the work the tool does.
Does Watermark Image upload my file to a server?
Your file is processed inside your browser by the HTML5 Canvas API. The engine reads the file's bytes from your tab's memory, computes the result, and writes the result back into the tab. You can confirm what the page does by opening developer tools and watching the Network tab during a run — the requests you see are for the tool's static assets only.
Will Watermark Image ask me to pay to download the result?
Watermark Image is free to use. The processing runs in your browser, which keeps the per-user cost low enough that the tool can be offered openly. The download is the same file the engine produced — you can use it for as many runs as you need.
Does Watermark Image need an internet connection to run?
Once the page is loaded, Watermark Image can complete jobs without an active internet connection — the engine is bundled with the page, so there is no per-job network call. The initial page load does require a connection (to fetch the static assets), but after that you can disconnect entirely and the tool will still work. This is a side-effect of the local-first architecture, not a deliberate "offline mode" feature.
Can Watermark Image run inside a corporate firewall?
Watermark Image is a static page running an open-source engine in your browser, so a typical corporate firewall does not get in the way as long as it allows JavaScript to load from Favtoo. For teams that need to host it themselves on an internal network, the underlying engine (the HTML5 Canvas API) is open-source and can be packaged into a private build with the same behaviour. Reach out via the Contact page if that is something you are exploring.