About these image tools
Every image tool on this page works inside your browser. When you choose or drop a file, it is read by JavaScript on your own device, drawn on an HTML canvas and saved straight back to your device; it is not uploaded to our server, and nothing is kept once you close the tab. That has a practical side as well as a private one: a batch of forty photos is processed without waiting for forty uploads, and the tools are safe to use on files you would rather not hand to a website, such as identity documents, family photos or a client's artwork.
The tools read JPEG, PNG, WebP, GIF, BMP, TIFF, ICO, SVG and AVIF, and write JPEG, PNG, WebP, BMP and multi-size ICO favicons. Each file is identified by its contents rather than its name, so a PNG that was renamed to .jpg is still read correctly, and a file that is not an image at all is refused before anything is done with it. Only Safari can decode TIFF natively, so the tools include their own TIFF decoder; HEIC photos from an iPhone can be opened only in Safari, and every tool says so plainly instead of failing without explanation.
Most of the size of an image file is decided by one choice: lossy or lossless. JPEG and WebP throw away detail the eye is unlikely to miss, and a quality setting between 75 and 85 percent is usually indistinguishable from the original on a screen while being a fraction of the size. PNG is lossless, so saving a PNG again at a different quality changes nothing. The compressor instead reduces a PNG to a palette of at most 256 colours, which is how most PNG optimisers work and often halves the size of screenshots, logos and diagrams without a visible difference. Photographs almost always belong in JPEG or WebP rather than PNG.
Photos from phones and cameras carry EXIF metadata: the camera model, the moment the picture was taken, often its exact GPS position, and sometimes the device's serial number. The metadata remover strips it from JPEG, PNG, WebP and GIF files without re-compressing the picture, then reads the cleaned file back and reports what, if anything, remains. Converting, resizing and editing also drop metadata, as a side effect of redrawing the image from its pixels, and the info checker shows exactly what a file contains before you share it.
PDF to Image renders pages with Mozilla's open-source pdf.js engine, which is loaded from this site only when you open a PDF and runs in your browser like everything else. Image to PDF builds the PDF itself: each image is resampled to the print resolution you choose, encoded once as JPEG and placed on its page as it is. The passport photo maker uses the same writer, so a sheet of eight copies contains the photo once and stays small enough to email.
Browser tools have limits that desktop software does not. An image above roughly 150 megapixels, or about 16 megapixels on an iPhone or iPad, cannot be held in a browser canvas, and animated GIFs are converted from their first frame. Social media dimensions and passport photo rules change over time and differ between platforms and countries, so the presets here are a starting point: check the current requirements before you post a campaign or submit an application.
How the tools handle your files
Checked by content, not by name
Every file is identified from its first bytes before anything else happens. A file renamed from .png to .jpg is read as the PNG it is, and a file that is not an image at all, whatever it is called, is refused with a message. SVG drawings are cleaned of scripts and external links and then drawn only as images, which browsers never allow to run code.
Processed one at a time
Batches are worked through one image after another, with a pause between each so the page stays responsive, and the memory each image used is released before the next one starts. Very large images get a warning, and images too large for a browser to hold are refused rather than processed badly.
Frequently asked questions
Are my images uploaded to a server?
No. The image tools read, process and save files entirely in your browser with JavaScript and the HTML canvas. Our server sends the page and its scripts, including the pdf.js engine when you open a PDF, but no image or PDF you choose is sent back to it, and nothing is stored after you close the page.
Is there a limit on file size or the number of files?
Each image can be up to 50 MB and each PDF up to 100 MB, and up to 50 files can be processed in one batch. The real limit is your device's memory: images above about 150 megapixels, or about 16 megapixels on iPhones and iPads, are too large for a browser canvas and are refused with a message rather than processed badly.
Which formats can I convert between?
JPEG, PNG, WebP, GIF, BMP, TIFF, ICO, SVG and AVIF can be opened, and JPEG, PNG, WebP, BMP and ICO can be saved. Safari cannot save WebP, so that option is marked as unavailable there. Transparent areas are filled with a colour you choose when saving to a format without transparency, such as JPEG or BMP.
Will converting or compressing reduce the quality?
Saving to JPEG or WebP is lossy, so some detail is discarded; at 80 to 90 percent quality the difference is rarely visible. PNG, BMP and ICO are lossless. The compressor keeps the original when re-encoding would make a file larger, and the metadata remover does not re-encode JPEG, PNG, WebP or GIF files at all.
Why is my iPhone photo (HEIC) not accepted?
HEIC can be decoded only by Safari, so in Chrome, Edge or Firefox the tools cannot read it. Open the page in Safari, or set the iPhone to save photos as JPEG under Settings, Camera, Formats, Most Compatible, or share the photo as JPEG first.
Do the tools work on phones and tablets?
Yes. Every tool works with touch, including the crop box, and files can be picked from the photo library or the camera roll. Large batches are processed one image at a time so the page stays responsive, but a phone will take longer than a computer on very large photos.