Convert images between PNG, JPG, WEBP, and AVIF

For each image, decide: does it need transparency, is it photographic, and where is it going? Those three answers pick the format for you. A logo or UI element with a see-through background needs an alpha channel, which rules out JPG immediately. A photograph is continuous tone, which is exactly what lossy photo codecs are built for, so JPG, WebP, and AVIF all serve it well while PNG bloats it. A file headed for a website should be as small as modern browsers allow; a file headed to a client, a printer, or an unknown app should open absolutely anywhere.

As a shorthand: PNG is lossless with transparency, ideal for logos, icons, screenshots with text, and anything you will edit again. JPG is the universal photo format every device and form upload accepts, with no transparency. WebP does both jobs — lossy or lossless, with alpha — at smaller sizes than PNG and JPG in most cases. AVIF compresses hardest of all and shines for web delivery, at the cost of being the newest and least universally opened outside browsers.

Those four cover the vast majority of image work, but they are no longer the whole menu. Novus Convert now also outputs GIF and APNG for animation, BMP and TIFF for archival and print pipelines, TGA for game-art workflows, and ICO for favicons — so a source image can target any of them where the route exists. The full input-to-output matrix runs to hundreds of active pairs and lives at /conversions; if a job needs one of the less common targets, confirm the pair there before you queue it.

Open convert.novusstreamsolutions.com/convert and drag the images in, or pick them with the file chooser. The queue accepts the active raster inputs — HEIC, HEIF, AVIF, JPG, PNG, WebP, BMP, and TIFF/TIF — plus SVG as a vector source you can rasterize to any of the supported outputs. Each file is identified by its signature rather than its filename, so a mislabeled image is caught here instead of producing a broken result later.

iPhone photos are the most common starting point for this workflow. HEIC and HEIF rows decode through a local WebAssembly worker that loads on demand, then convert to whichever raster output you choose, so turning a camera roll into JPGs or WebPs never involves an upload.

Every image row carries its own output selector, so a mixed queue does not force one answer on every file. Set the logo row to PNG, the product photos to WebP, and the screenshot to PNG in the same pass. When the whole batch is going to the same place — say, thirty photos becoming a web gallery — pick the shared output once across the compatible rows instead of setting it thirty times.

Resist the habit of converting everything to the format you use most. A PNG of a photograph can be several times the size of a visually identical JPG or WebP, and a JPG of a flat-color logo grows soft, ringed artifacts around clean edges. The per-row choice exists precisely so each image can land in the format its content deserves.

Transparency is the one property a format either keeps or destroys, so settle it before converting rather than discovering it after. PNG and WebP outputs carry the alpha channel through intact. A JPG output cannot, and Novus Convert composites the transparent region onto white instead of pretending otherwise — which is fine when the destination is a white page, and wrong when it is anything else.

If a transparent source must become a JPG for a strict uploader, check what the white backdrop does to the subject first, especially around soft or anti-aliased edges where semi-transparent pixels blend into the background color. When the edge looks dirty against white, keep the file in PNG or WebP and solve the destination requirement another way.

Between the lossy options, the practical ordering is simple: AVIF produces the smallest files, WebP sits in the middle, and JPG is the largest but opens everywhere without question. For a modern website, WebP or AVIF is nearly always the right call. For email attachments, marketplace uploads, and files other people will pass around, JPG remains the safe default because nothing rejects it.

When the goal is a smaller file in the same format rather than a different format, that is a job for convert.novusstreamsolutions.com/compress, where JPG, PNG, and WebP get an adjustable quality control and a measured before-and-after size. Conversion and compression stack naturally: convert a HEIC to JPG first, then compress the JPG until the size fits the destination.

Run the batch and let each row finish. Downloads unlock only after the output proves decodable, so a file that appears in your downloads folder is structurally a real image — but structural validity is not the same as visual quality, and that second judgment is yours. Open each converted file at full size and look at the places conversion damage shows first: edges of text, skin tones, gradients like skies, and the boundary between a subject and a transparent or white background.

Check the practical constraints while you work. Image routes accept sources up to 100 MB and 80 megapixels, and daily download allowances differ by input format — the remaining count sits beside the download action. Save everything you need before closing the tab, because result URLs are temporary and vanish with the session.