Convertisseur d'image

The tool accepts and exports common bitmap formats: input and output for JPG/JPEG (.jpg/.jpeg), PNG (.png), WebP (.webp), GIF (.gif), BMP (.bmp), TIFF (.tiff/.tif) and HEIC (.heic). Animated GIFs can be preserved by converting to animated WebP or exported frame-by-frame as separate PNGs; converting GIF to a single PNG will use the first frame by default. Individual files up to around 50 MB work comfortably in Chrome or Firefox on desktop; very large TIFFs or multi-frame HEICs may hit browser memory limits.

Click the 'Add files' button or drag-and-drop your .jpg/.jpeg files into the browser area, then choose 'PNG' from the format dropdown. Optionally use the 'Resize' or 'Quality' controls and enable 'Preserve transparency' (if available) before pressing the 'Convert' button. When conversion finishes click 'Download' for each file or 'Download all' to get a ZIP; the converted files will have a .png extension and retain lossless data, so file sizes will usually increase compared to JPG.

Upload one or more .webp files with 'Add files' or drag-and-drop, pick 'JPG' as the output format, then use the 'Quality' slider (0–100) to control lossy compression before hitting 'Convert'. Note that WebP supports transparency while JPEG does not, so the tool provides a 'Background color' field to fill transparent pixels (default white); choose a hex code like #ffffff if you need white. After conversion download the .jpg files; expect some quality loss depending on the chosen Quality value and higher compression reduces file size but removes detail.

Yes — this tool converts .heic to .jpg directly in the browser with no signup and no watermark: click 'Add files', select the HEIC images, choose 'JPG' and press 'Convert'. On iPhones, Safari sometimes hands the browser a converted JPEG instead of the original HEIC depending on iOS settings; if the HEIC upload fails, use Chrome for iOS or add the HEIC from the Files app rather than the Photos picker. Keep HEIC files below ~50 MB each for reliable in-browser conversion; very large HEIC sequences can trigger memory errors.

You can add multiple files at once — the interface accepts batches (practical testing shows up to ~30 images at once in Chrome/Firefox); however, performance depends on file size and your device RAM. We recommend keeping individual files under ~50 MB and keeping total batch size under ~1 GB to avoid browser slowdowns or crashes; on low-memory mobile browsers you may need to break large jobs into smaller batches of 5–10 files. Use 'Download all' to get a ZIP of results after conversion.

Conversions are performed client-side in your browser using JavaScript/WebAssembly, so files do not get uploaded to a remote server — they remain on your machine during the session. That means EXIF and metadata are preserved or removed only if you enable the 'Remove EXIF' option in 'Advanced settings'; still, local processing uses your system CPU and memory so very large batches may fail. Because there is no account or upload, you won't need to sign up and no watermarks are added to converted images.

Both PNG and WebP support alpha transparency; when converting PNG to WebP or vice versa, enable 'Preserve transparency' or leave the default settings so the .png alpha channel or .webp alpha is kept. If you convert PNG to JPG, JPEG doesn't support transparency — the tool shows a 'Background color' option where you must pick a hex like #000000 or #ffffff to fill transparent areas. Also note that converting to lossy WebP with a low Quality value can introduce slight artifacts in transparent edges.

By default converting a GIF to a single PNG or JPG will export only the first frame, which is why animation appears lost. If you want animation preserved, choose 'Animated WebP' or 'Animated GIF' as the output format and check the 'Preserve animation' box before converting; the output will then be a .webp or .gif that keeps frames. To extract frames as separate images, use the 'Extract frames' option — the tool will produce multiple .png files (one per frame) and a ZIP for download.

After selecting your output format use the 'Quality' slider (0–100) for lossy formats like JPG and WebP — lower numbers give smaller files but more artifacts. For PNG and GIF choose 'Lossless' or 'Optimize' where available; PNG is inherently lossless so file reduction is achieved via optimization not quality drop. There is also a 'Resize' control to scale dimensions (pixel width/height) which is the most effective way to reduce size; test different Quality/Resize combos and compare outputs before processing large batches.

First, reduce batch size: convert 5–10 files at a time instead of 30, and keep individual files under ~50 MB to reduce memory use. Switch to Chrome or Firefox on desktop which handle large JS/WebAssembly jobs better than older Safari or low-memory mobile browsers, clear the browser cache, and close other tabs to free RAM. If a specific HEIC or TIFF file fails, open it in a local image viewer to check for corruption and re-export it as a smaller file or a different format before retrying.

Yes, the site works in mobile browsers, but mobile limits are stricter: iOS Safari and some Android browsers have tighter memory and may convert HEIC to JPEG during upload depending on settings. On iPhone use 'Add files' and pick from the Files app to get original HEICs, or try Chrome for iOS if Safari changes the format; on Android Chrome you can upload WebP and HEIC without problems. For large batches or high-resolution photos use a desktop browser to avoid crashes and to get the fastest performance.

Image Converter Online is designed for quick format changes—JPG, PNG, WebP, GIF, BMP, TIFF, HEIC—without installing software and with no signup; it handles bulk jobs and basic options like Quality, Resize, Background color, Preserve animation and Remove EXIF. Photoshop and other desktop tools offer advanced color management (ICC profiles), layer handling, precise batch actions and better handling of very large RAW/TIFF files, so for print or color-critical work use desktop tools. For routine conversions, previewing quality and small batches, this tool is faster and free, but it doesn't expose professional-level color/profile controls or CMYK export.