Blur Image — Add Blur Effect Online
Apply gaussian blur to images with adjustable radius.
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 Blur Image
Blur Image is shaped around how people actually use image editing and conversion utilities online: open the page, drop in a file, get the result. Apply gaussian blur to images with adjustable radius. The interface stays out of the way once the work begins so the engine can use the available CPU and memory for the actual transformation.
The engine behind the page is the HTML5 Canvas API. It reads your file in-memory and writes the result back into the browser. Supported inputs include JPG, PNG, WebP, and BMP. For 50 MB and below the work usually completes in seconds; larger files mostly depend on how much spare RAM your device has.
Blur 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.
The browser sandbox isolates the page's JavaScript from the rest of the system, the same way it isolates every other tab you have open. Blur Image works inside that sandbox: it reads the file you give it, processes it with the HTML5 Canvas API, and writes the result back. Nothing leaves the page's memory unless you choose to download or copy it.
The architecture imposes only the limits the browser itself imposes. The published 50 MB ceiling is conservative; most modern devices comfortably handle inputs up to that size, and the cap exists so the tool degrades gracefully on phones and budget laptops rather than running out of memory.
Blur Image sits in a small group of related tools. Useful neighbours include Compress Image, Resize Image, Crop Image, and Watermark Image. They are designed to compose: the output of one is a sensible input to the next, so a multi-step task is usually a sequence of single-click operations.
Common audiences for Blur Image include students compiling visual reports and e-commerce owners cleaning product shots, but plenty of people land on the page through a one-off search and never come back — that is also fine. The tool is built to be useful even when you only ever need it once.
When the job finishes, Blur Image hands you the result as `{name}-blurred.{ext}`. Filenames are derived from your input where possible, so a quick batch of jobs leaves you with a tidy folder rather than a pile of generic "output (3)" files. Nothing is auto-saved on Favtoo's side because nothing was ever sent there.
Blur Image is honest about scope: it handles a single, well-defined image editing and conversion step. Specialist edge-case work — uncommon formats, very large inputs, or pipelines that need scripting — is what dedicated desktop apps are for. This page handles the common case quickly.
Blur Image is one example of a broader pattern: utility software increasingly works as single-page, client-side experiences. Every page in the catalog is shaped that way, which keeps each tool fast to load and easy to recommend in a single link.
Useful patterns when working with Blur Image: keep the input file open in another tab so you can compare against the result; give the output file a descriptive name when saving so you can find it later (the default name is sensible but generic); and treat each run as independent — the tool has no concept of "history", which means you cannot accidentally pollute one job with leftovers from another.
Blur Image is built around the moment of need: a focused page you open when you have a specific task, complete the task, and close. The catalog contains many adjacent tools so the same model serves the surrounding parts of a typical image editing and conversion workflow.
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).
That is essentially everything Blur Image does and how it does it. Open the tool above, drop in your input, and the work happens in the page. If you find yourself reaching for it often, bookmark the page — it loads quickly on subsequent visits, and your most-recent settings are remembered for the rest of the session.
How it works
- 1Land on the Blur Image page. The tool is ready to use the moment the page renders.
- 2Add your JPG, PNG, WebP, and BMP input by dropping it onto the page or browsing for it.
- 3Tweak the controls if the defaults are not quite right for your input. The options are kept short and labelled in plain language.
- 4Hit the run button. the HTML5 Canvas API does the work in your browser tab.
- 5Save the output (`{name}-blurred.{ext}`) when it is ready.
- 6Re-run with different settings as often as you want. Each run produces a fresh output and the original file on disk is never modified.
Common use cases
- Optimise a product photo so it loads quickly on a slow connection using Blur Image.
- Compose a mockup banner without bouncing between three different apps.
- Generate a square thumbnail from a wide marketing photo.
- Prepare a transparent logo for use over different backgrounds.
- Apply a quick filter for a social-media post.
- Resize a hero image for a landing page without losing crispness.
- Produce a printable card from a single source image.
- Convert a phone screenshot into a CMS-friendly format.
FAQ
Can I control the blur amount?
Yes — use the radius slider to set the blur strength from subtle to heavy.
Can I blur just part of the image?
Currently the blur is applied to the entire image. Selective blur may be added in a future update.
What blur algorithm is used?
A Gaussian blur filter is applied via the Canvas API for smooth, natural-looking results.
Can I process multiple files at once with Blur Image?
Blur Image processes one input at a time by design — it keeps memory usage predictable on lower-end devices and makes results easier to verify. To handle a folder, run the tool once per file; the page stays loaded between runs and remembers your last-used settings, so the second run is essentially instant.
Is Blur Image really free?
Blur 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 Blur Image work on a phone or tablet?
Blur Image runs in any modern mobile browser — Safari, Chrome, Firefox and the in-app browsers in most messaging apps all support the underlying APIs. Performance depends on the device: a recent phone handles typical inputs nearly as fast as a laptop, while older devices may take a few seconds longer near the 50 MB ceiling. The interface lays out cleanly on small screens, so you do not need to pinch-zoom to see the controls.
What does Blur 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. Blur 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.
Will Blur Image keep working if my Wi-Fi drops mid-task?
Once the page is loaded, Blur 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.
Does Blur Image require a browser extension or plug-in?
No installation is needed. Blur Image runs as a normal web page, with no browser extension, no native helper, and no separate desktop client to download. That is partly a privacy choice — extensions can request broad permissions, while a regular page is sandboxed by default — and partly a convenience one: you can use Blur Image on any computer you have temporary access to without leaving anything installed on it.
Does Blur Image work with screen readers?
Blur Image uses native HTML controls wherever possible, which means keyboard navigation, focus rings, and screen-reader labels work the way the platform expects. The drop zone accepts files via the keyboard-accessible file picker as well as drag-and-drop, and result downloads use standard browser download flows. If you spot an accessibility gap, Favtoo treats it as a bug worth fixing.
Does Blur Image match what professional tools produce?
Blur 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.