Image Viewer — Preview & Inspect
Upload and view images directly in the browser with zoom controls, fullscreen mode, and file info display.
Drop your image hereTap to select a file
Supports PNG, JPG, GIF, WebP, SVG, BMP, up to 100MB
What to do next
About Image Viewer
Image Viewer is an image tool that runs in your browser. Upload and view images directly in the browser with zoom controls, fullscreen mode, and file info display. The page you are reading is the same workspace you will use to do the work: pick a file or paste your input, choose the options that matter to you, and the tool produces the result on your device.
The engine behind the page is standard browser APIs. It reads your file in-memory and writes the result back into the browser. Supported inputs include PNG, JPG, GIF, WebP, BMP, SVG, and TIFF. For 100 MB and below the work usually completes in seconds; larger files mostly depend on how much spare RAM your device has.
Image Viewer fits naturally into the workflow of social-media managers sizing posts and illustrators packaging artwork, both of whom typically need a fast result inside the browser. There is no learning curve to budget for: anyone who has used a typical web upload form can complete a run on the first try.
The execution model is straightforward: your file is bytes in the tab's memory, the engine reads those bytes, computes the result, and hands the result back to the browser. The transformation happens locally, which is why the tool keeps working when your network connection drops mid-job and why it produces the same result every run for the same input.
The right moment to reach for Image Viewer is when you have a focused image editing and conversion job that fits inside a browser tab. Open the page, drop in the file or paste your input, choose the options that matter, and the tool returns the result.
Once the engine finishes, the output is offered as an immediate download. There is no preview gate, no email-wall, and no "register to download" intermediary — the file is yours the moment it is ready.
The architecture imposes only the limits the browser itself imposes. The published 100 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.
For multi-step jobs, Image Viewer sits next to Image Analyzer, Find Dominant Colors, and Blank Image Generator. None of them depend on each other — you can use Image Viewer on its own — but together they cover the common variations of the task this page exists to handle.
The transformation in Image Viewer 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.
Image Viewer is structured around the idea that a useful tool should be its own page. Open the page, do the work, close the tab — the page is the entire product. There is no onboarding flow because there is nothing to onboard into.
Image Viewer fits the gap where opening a desktop app feels heavy and writing a script feels overkill. The page handles the common image editing and conversion task with sensible defaults so a single visit usually completes the job; for highly specialised work, a dedicated desktop application can offer more knobs to turn.
Tips from users who reach for Image Viewer 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.
If the result is not what you expected, the most common causes are easy to check. Confirm the input is under the 100 MB ceiling — files just above the cap fail silently because the engine refuses to allocate the buffer. Confirm the input is one of the supported formats. And if the page itself feels slow, try closing other heavy tabs to free up memory; the engine runs in your browser, so it competes for the same resources as everything else open.
That is essentially everything Image Viewer 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
- 1Open Image Viewer in your browser. The page loads quickly and the tool is ready to use the moment it becomes interactive.
- 2Drop a PNG, JPG, GIF, WebP, BMP, SVG, and TIFF file onto the upload area, or click to pick one from your device.
- 3Adjust the options to match what you need. Sensible defaults cover the most common case, so you can usually skip this step.
- 4Trigger processing. standard browser APIs reads your input, applies the transformation, and writes the result back into the page.
- 5Grab the output 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
- Strip EXIF data from a photo before posting it publicly using Image Viewer.
- Convert a batch of camera files into web-friendly formats.
- Convert a phone screenshot into a CMS-friendly format.
- Sharpen a slightly soft photo before sending it to print.
- Compose a mockup banner without bouncing between three different apps.
- Produce a printable poster from a single source image.
- Resize a hero image for a landing page without losing crispness.
- Apply a quick filter for a social-media post.
- Optimise a product photo so it loads quickly on a slow connection.
FAQ
Input formats?
Data URIs (data:image/...) and HTTP/HTTPS image URLs are both supported.
What info is shown?
Format, estimated file size, base64 length, and HTML/CSS embed snippets.
Large images?
Very large data URIs may be slow to process. The tool handles typical web image sizes well.
CORS?
External URLs may be blocked by CORS. The embed code includes crossOrigin attributes when needed.
Private?
Yes — viewing runs locally.
Download?
Right-click the preview or use the data URI in an anchor tag with download attribute.
Does Image Viewer ask for any browser permissions?
Image Viewer 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.
How long does Favtoo retain my data after using Image Viewer?
Favtoo keeps no copy of your file because Favtoo never receives your file. Image Viewer runs entirely in your browser, the input is held only in your tab's memory, and closing the tab discards it. There is no opt-in cloud history, no "recent jobs" panel synced to an account, and no server-side retention to configure — the architecture simply has nowhere for your file to be stored.
Why use Image Viewer instead of a paid online tool?
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. Image Viewer 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.
Can I call Image Viewer from a script?
Image Viewer is a browser-only tool by design and does not expose a hosted API. The reason is the same as the privacy story: there is no Favtoo backend doing the work, so there is no service to call. If you need to script the same transformation, the underlying engine (standard browser APIs) is open-source and can be used directly from your own code.
Which file formats does Image Viewer accept?
Image Viewer accepts PNG, JPG, GIF, WebP, BMP, SVG, and TIFF. If your input is in a format that is not directly supported, convert it first using one of Favtoo's converter tools — every Favtoo converter outputs a file that is a clean input to the next tool in the chain.
What does the error message in Image Viewer mean?
Failures usually fall into one of three buckets: the input is in an unsupported format, the input is over the size cap, or the input is structurally malformed (a truncated download, a partial export, or a stream the engine does not recognise). The first two are easy to confirm — check that your file is one of PNG, JPG, GIF, WebP, BMP, SVG, and TIFF and that it is below 100 MB. For the third, opening the file in its native viewer first is the fastest way to confirm the source is intact.
Is Image Viewer licensed for business use?
Image Viewer can be used for personal and commercial work alike — there is no separate "business" licence to purchase. The output you generate is yours to use however you want, including in client deliverables, internal documents, or commercial products. Favtoo's only ask is fair, individual use; the tool is not designed to be embedded as a backend service or wrapped behind an API for resale.