Compress Image

Image ToolsPremium

Reduce image file sizes without visible quality loss.

Nothing Is UploadedRuns In This Browser TabNo Account Needed

How It Works

1

Upload / Input

Select your files or paste your content to get started.

2

Process

The work happens in this browser tab. Your file never leaves your device, so nothing is queued, stored or transmitted.

3

Download / Result

Get your results instantly. Download files or copy output in one click.

Features

JPEG re-encoding at the quality you choose
Adjustable quality slider, remembered between visits
Batch compress multiple images
Original and compressed size shown per file and in total
Accepts JPG, PNG and WEBP; downloads as JPG

How to use Compress Image

  1. Add your images

    Drop in one file or a batch. Everything is processed locally.

  2. Choose a quality level

    Around 80% is the usual sweet spot — visually indistinguishable from the original at roughly a third of the size.

  3. Compare before and after

    Check a detailed area and any text in the image. Those show artefacts first.

  4. Download

    Save the compressed JPG alongside your original rather than over it — whatever you put in, a JPG is what comes back.

When to use Compress Image

  • Speeding up a website by reducing image payload
  • Getting attachments under an email size limit
  • Fitting a photo into an upload form with a strict file-size cap
  • Reducing storage used by a large photo archive

FAQ

A JPG, always, whatever you put in. That is what makes the saving, and it is also the catch: JPEG has no transparency, so a PNG cut-out comes back with the transparent area filled in. For those, keep the PNG and use Resize Image to bring the dimensions down instead.
Most photographs can be reduced by 50-80% at around 80% quality without noticeable loss. The exact savings depend on the image content and on what it was to begin with — a JPG that is already compressed has far less to give.
Yes, and there is no option to keep it. The image is decoded, redrawn onto a canvas and re-encoded, and EXIF does not survive that — camera settings, capture date and any GPS location are gone from the output. For most uses that is a privacy benefit; if you need the metadata preserved, this is not the right tool.
Typically 60-70% smaller at around 80% quality, with no difference visible at normal viewing size. Photographs tolerate this far better than screenshots or images containing text.
Compressing keeps the pixel dimensions and stores them less precisely. Resizing reduces the number of pixels. Resizing is usually the bigger win and is visually safer.
No — it mostly just degrades the image. Each pass compounds the previous loss for very little additional saving. Always compress once, from the original.
JPEG compression is built for photographs and handles the sharp edges of text and UI badly, producing visible fringing. This tool only writes JPG, so for a screenshot keep the PNG and use Resize Image to bring the dimensions down instead.

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About Compress Image

Image compression trades precision for size. JPEG works by discarding detail the eye is least sensitive to, which is why an 80%-quality file typically looks identical to the original while being far smaller. Push below about 60% and the losses become visible as blocky patches around edges and text.

The single most damaging habit is repeated re-compression. Every time a JPEG is opened, edited and saved, it is compressed again on top of the previous loss. Do that a handful of times and the degradation is obvious. Keep a master copy in its original quality and always export from that.

If a file is still too large after compressing hard, compression is the wrong lever — the image is simply bigger than it needs to be. Reduce the dimensions first; a 1200 px image at 80% quality will comfortably beat a 4000 px image squeezed to the same file size, and it will look better.

Tips and limits

  • 80% quality is the practical sweet spot. Below 60% artefacts become visible.
  • Never re-compress an already-compressed image; losses accumulate permanently.
  • If compression is not enough, the image is too large in pixels — resize instead.
  • WebP is roughly 25-35% smaller than JPG at equivalent quality and is supported everywhere that matters.
  • Screenshots and images containing text compress badly as JPG, and JPG is the only thing this writes. Resize those instead of compressing them.