Compress JPG, PNG & WebP without changing the format

These are two separate operations, and choosing the right one saves you from fighting the wrong tool. Conversion, at /convert, turns one format into another — a HEIC into a JPG, a PNG into a WebP. Compression, at /compress, leaves the format exactly where it is and makes the file smaller by re-encoding it at a lower quality. If the format is already correct and only the size is a problem, you want compression, not conversion.

The practical test is to ask what is actually wrong with the file in front of you. If a strict uploader rejects the format, or a website needs WebP instead of PNG, that is a format problem and it belongs at /convert. If the format is fine and the file is simply too large to attach, upload, or serve quickly, that is a size problem and it belongs at /compress. When both are true, you handle them in order, which the final step covers.

Go to convert.novusstreamsolutions.com/compress. This surface does one thing on purpose, so there is no output-format selector to distract you — the only decision is how hard to compress. It accepts three inputs: JPG, PNG, and WebP. Those are the raster formats where a quality control has a meaningful, adjustable effect, so they are the ones the compression workflow exposes.

Everything happens on your device. The file is re-encoded in browser memory, never sent to a remote service, and Novus Convert identifies each file by its signature rather than its filename, so a mislabeled image is caught before it is processed. If you drop in a format the compressor does not accept, that is a sign the job actually starts at /convert instead.

Drag a file in or pick it with the file chooser. Before you change anything, note the original size the app reports — this is your baseline, and every decision from here is measured against it. Knowing you are starting from, say, 4.2 MB is what makes the result meaningful; a smaller number means nothing without the number it started from.

Keep the three accepted inputs in mind. If your source is a HEIC from an iPhone, an AVIF, a TIFF, or anything other than JPG, PNG, or WebP, the compressor is not the right first stop — take it to /convert to produce one of the three compressible formats, then come back here. Loading the wrong type is not a failure so much as a nudge toward the correct order of operations.

The quality control is the whole point of this surface. Lower quality means a smaller file and more visible compression; higher quality means a larger file that stays closer to the original. There is no single correct setting, because the right level depends on what the image is and where it is going, so let the content of the file guide the number rather than reaching for a habit.

Photographs are forgiving — continuous tone and soft detail hide a lot of compression, so you can push the quality down noticeably before anyone would tell. Flat graphics, screenshots, logos, and anything with text or hard edges are the opposite: artifacts show up early as fuzz and halos around sharp lines, so those want a gentler setting. Because the format never changes, a PNG or WebP with transparency keeps its alpha channel throughout — compression here shrinks the file without flattening a see-through background.

After compressing, Novus Convert shows you the measured size of the result, not an estimate — the actual bytes of the re-encoded file. Compare it to the baseline you noted in step three to see exactly what the quality level bought you. If the drop is disappointing, or if it is large enough that you suspect visible damage, that is your cue to adjust the quality and re-run rather than accepting the first attempt.

The download button appears only after the result passes validation, so a file you can download is a genuine, decodable image and not just something with the right extension. Structural validity, though, is not the same as looking good — open the compressed file at full size and check the places compression shows first: text edges, skin tones, gradients like skies, and the boundary between a subject and its background. If it looks soft, raise the quality; if it looks perfect and the size still feels heavy, you have room to push lower.

Conversion and compression are built to work in sequence when a file needs both a new format and a smaller size. A common example is an iPhone photo: convert the HEIC to a JPG at /convert, which decodes locally through a WebAssembly worker so the photo is never uploaded, then bring that JPG to /compress and shrink it until it fits the destination. Each surface does its own job cleanly, and running them in order beats trying to force one tool to do both.

Mind the practical boundaries while you work. Image inputs are accepted up to 100 MB and 80 megapixels, and JPG, PNG, and WebP each draw on a daily download allowance that resets by local calendar day — the remaining count sits beside the download control, so free is not the same as unlimited. Results live behind temporary object URLs that vanish when you remove the job or close the tab, so save each compressed file you want before you leave.