Marketplace & product listings
Compress Image to 500 KB
Preset and ready: drop a file and the output lands under 500 KB as JPEG — processed entirely in your browser.
Drop your image here or browse
JPEG, PNG, WebP — everything stays on your device
Why this exact limit matters
Five hundred kilobytes is a display-first budget: the range where marketplaces, portfolios and photo widgets accept near-pristine images because the ceiling exists to block camera originals, not to squeeze yours. At this level compression becomes almost invisible — the encoder reaches the high end of its quality ladder while the file stays a fraction of what a phone produces.
A fixed target turns bulk image preparation into a repeatable step: same ceiling, every file, no per-image editing. 500 KB is a generous limit that still catches full-size phone photos, and this page is preset to exactly that ceiling.
How to compress to 500 KB
- Drop your image into the box above — it stays on your device.
- Confirm the target: under 500 KB as JPEG.
- The MozJPEG encoder searches its quality range so the JPEG output lands just under your limit. Dimensions are left at their original size unless the target demands otherwise.
- Preview the result, compare it with the original if you want, and download — the filename carries its actual size.
Tip: For product photos, fill in the marketplace's recommended pixel dimensions along with the size limit — meeting both at once is what the dual-constraint input is for.
Measured: 500 KB at high definition
Our 914 KB portrait test file against a 500 KB ceiling with a 1920-pixel display cap — the frame a zoomable product or gallery view actually uses:
Source file
914 KB
1500×1800 JPEG
Output
485.1 KB
1.9× smaller
Frame
1067×1280
HD display scale
Quality setting
q90
near-pristine
Quality 90 is the territory where compression artifacts disappear in normal viewing — this is the version of compression that exists to satisfy a rule, not to save space. Camera originals (3 MB and up) feel the ceiling more: the same 500 KB over a 6000×4000 frame holds only quality 12 unless the frame comes down.
Frequently asked questions
At 500 KB am I even compressing?
You are normalizing: phone originals vary wildly (2–10 MB), portals need predictability. A uniform 500 KB ceiling turns an unpredictable pile of uploads into consistent, fast-loading assets — with quality high enough that nobody asks what changed.
Why cap at 1920 pixels if my source is bigger?
Because displays are not. A 1920-pixel image fills nearly any screen and every zoom view a marketplace offers; the pixels beyond it cost budget that quality could use. Leave the cap off only when the file feeds print or heavy cropping.
WebP would be smaller at this quality — should I switch?
Often, yes — at comparable quality WebP runs 25–35% smaller. Use it when your destination accepts the format; use JPEG where the platform or the recipient’s tools demand compatibility.
Will compression hurt my listing's image quality score?
Marketplaces score zoom sharpness, and this tool maximizes quality within your stated ceiling. Give it the largest ceiling your marketplace allows rather than the smallest that passes.
How does the tool hit the exact JPEG size?
It encodes your image with the MozJPEG encoder several times, binary-searching the quality setting until the output lands just under your limit — then keeps that best result.
Do I need an account or app install?
No account, no install, no watermark. The page you are on is the whole tool.