Shrink JPG, PNG & WebP photos to an exact size — 20KB, 50KB, 100KB or any target. Your images never leave this device.
PDFZero's image compressor reduces the file size of JPG, PNG and WebP photos directly inside your browser — nothing is uploaded to a server, there's no signup, and no watermark is added. It's built for the most common real-world need: getting a photo or signature under a strict size limit like 20 KB, 50 KB, 100 KB or 200 KB for exam applications, job portals, government forms, visa applications and email attachments.
Most online image compressors upload your photo to a server, process it there, and send it back. That means a copy of your image — which might be your passport photo, signature, ID card or a private picture — sits on someone else's infrastructure. PDFZero uses your browser's own HTML5 canvas engine to re-encode the image locally, so the file never crosses the network. Once the page has loaded, it even works offline. For identity documents and personal photos, local processing is the most private option available.
JPG is the best choice for photographs and scanned documents — it compresses photos to the smallest sizes and is accepted by virtually every website and government portal. WebP is even smaller than JPG at the same quality, but some older portals don't accept it. PNG is lossless and keeps sharp edges perfect (good for screenshots and logos), but produces much larger files — if your PNG photo is too big, converting it to JPG here will usually shrink it by 80–95%.
Exam and job portals in many countries enforce photo and signature upload limits — commonly photo between 20 KB and 100 KB and signature between 10 KB and 50 KB. Email providers typically cap attachments around 25 MB, and websites load faster when images are under 200 KB. With target-size mode you type the exact number the portal asks for and get a file that fits — no trial and error.
Choose your image, switch to Target size mode, type the size you need (for example 20 KB or 100 KB), and click Compress. PDFZero automatically finds the best quality setting that fits under your target size — ideal for exam forms, job applications and government portals that enforce strict upload limits.
Yes. Compression happens entirely in your browser using the HTML5 canvas — your photos are never uploaded to any server. Personal photos, ID documents and signatures stay on your device the whole time.
You can compress JPG/JPEG, PNG and WebP images. You can also convert between formats while compressing — for example turn a large PNG into a much smaller JPG or WebP.
Some quality is traded for a smaller file, but at 70–85% quality most photos look visually identical to the original. Aggressive targets like 20KB may show visible compression on large photos — the built-in preview lets you check before downloading.
Yes. Select or drag in several images and PDFZero compresses each one with the same settings, then lets you download them individually or all at once.
No. Because everything runs locally in your browser there is no server-side cap, no daily limit, no signup and no watermark. Very large images just take a moment longer on slower devices.