ImgExact

Compress an image

Choose how aggressive the compression should be — or slide quality manually. You get a clear report of bytes saved, dimensions and format.

Images never leave your device No signup, no email No file limits or watermarks Works offline once loaded

Quality mode

Last reviewed . Runs locally — your images never leave your device.

How it works

  1. Drop your image.
  2. Pick a quality mode: Light (visually near-identical), Standard (recommended), Aggressive (smallest usable), or set quality manually.
  3. Compress and review the before/after numbers.
  4. If you need a specific limit, jump to the exact-size compressor with your settings intact.

Common requirements

  • Light (≈ 0.9) — Product shots and portfolio images where the original look must survive.
  • Standard (≈ 0.8) — The default most people want: much smaller files, no visible difference at normal sizes.
  • Aggressive (≈ 0.6) — Blog images, thumbnails and attachments where size beats fine detail.
  • Keep transparency — WebP output when a transparent PNG has to shrink without losing its alpha channel.
  • Convert to JPEG — When a lossless PNG simply cannot get small enough.
  • Downscale first — For huge photos: match the display size, then compress — usually the biggest single saving.

How to reduce image file size (and what "without losing quality" really means)

Choose how much you are willing to trade. Light (about quality 0.9) is visually near-identical, Standard (about 0.8) is the usual choice for photos, Aggressive (about 0.6) is for cases where size beats fidelity. The report shows the quality actually used, so nothing is hidden from you.

When people ask to compress image without losing quality, the honest answer has two parts. For JPEG, WebP and AVIF some detail is always discarded — that is what makes them small, and at Standard the loss is normally invisible. For PNG the squeezing is lossless: identical pixels, but often only a small saving.

There is a second lever: fewer pixels. Downscaling to the largest size the destination actually displays saves more bytes than any quality slider, and the before/after panel shows both numbers side by side.

This is a photo compressor free of signups, watermarks and daily caps, and it is compress JPEG online without an upload step: the file is decoded in your browser tab and never leaves it. If your requirement is a number rather than a feeling — "under 100 KB" — the exact-size compressor continues with the same engine.

Supported formats

JPEG, PNG, WebP, AVIF and GIF (first frame).

Best with files up to 50 MB. Hard safety limit 200 MB.

Privacy

Everything happens in your browser: the image is decoded, transformed and encoded locally. Nothing is uploaded, and no filename, pixel data or metadata is sent anywhere. Read more on the privacy page.

Technical methodology

  • Light ≈ quality 0.9, Standard ≈ 0.8, Aggressive ≈ 0.6 for quality-capable formats. The exact value used is shown in the report.
  • Transparent images default to WebP output when you ask for maximum savings without losing transparency; otherwise PNG output keeps lossless behavior.
  • PNG inputs that would grow from re-encoding are returned unchanged, with an explanation — the tool never returns a bigger file silently.

Known limitations

  • No visible size guarantee by design — use the exact-size compressor when a numeric limit is required.
  • GIF animation is not preserved (first frame only).

Go deeper: image compression explained · which image format to use · choosing a free image compressor

Compress to exact size Hit a target file size like 50 KB or 200 KB with the best quality that fits. Convert image JPG, PNG, WebP, AVIF — convert, with resize in the same pass if you want. Image size checker Instant report: file size, pixels, ratio, megapixels, metadata, print size.

Frequently asked questions

Will compression visibly damage my image?

At Standard quality, most photos show no visible difference at normal viewing sizes. Aggressive mode trades some quality for size; the tool always lets you compare before downloading.

How is this different from the exact-size compressor?

This tool optimizes for quality at a chosen level. The exact-size tool optimizes for a byte limit you type. Both share the same engine — pick based on whether you know your limit.

Does it work on PNG?

Yes, but PNG is lossless, so gains are smaller or require converting to WebP/JPEG. The tool reports when a PNG cannot shrink without format change.

What does compression actually do to a PNG?

PNG compression removes redundancy between pixels, not pixel information, so the result is identical to the eye and mathematically lossless. The consequence is that a detailed PNG often shrinks only slightly — converting it to WebP or JPEG is the real fix when size matters.