JPG Compressor

How to compress a JPG file

Drop your JPG above and use the quality slider to control the size-vs-quality trade-off. The before/after file sizes update in real time. For most photos, 80% quality is the sweet spot — it looks identical to the original at 40–60% smaller. Nothing is uploaded; compression runs in your browser using the Canvas API.

Frequently asked questions

How much can I compress a JPG?

Most JPEG photos can be compressed 40–60% at 80% quality with no visible difference. At 70% quality, savings reach 60–75% with only slight softening in areas with sharp text or fine details. A 5 MB photo typically compresses to 1–2 MB at 80% quality.

How do I compress a JPG to a specific size in KB?

Start at 80% quality and check the output size shown. If still too large, lower quality to 70% and check again. For further reduction, first resize the image using the image resizer — halving both dimensions reduces file size ~75% before any quality compression. Combining resize and compress gives the smallest possible file.

Does compressing a JPG change the dimensions?

No — compression reduces file size while keeping the pixel dimensions identical. To change dimensions, use the image resizer. For maximum reduction, combine both: resize to smaller dimensions first, then compress.

What is the best JPEG quality for web images?

80–85% is the industry standard for web use. Google's own PageSpeed recommendations target this range. At 80%, photos look sharp at normal viewing distances and scroll speeds, while file sizes are 40–60% smaller than the original — enough to meaningfully improve page load time and Core Web Vitals.

Can I compress a JPG without losing quality?

Technically all JPEG compression is lossy, but at 85–90% quality the difference is imperceptible to the human eye. The pixels change by 1–3 values out of 255 — indistinguishable from the original in normal viewing conditions. For true lossless storage, convert to PNG — but PNG files will be larger than JPG.

How do I compress JPG on iPhone?

Open toolchop.com/jpg-compressor in Safari on your iPhone. Tap the upload area to select a photo from your Camera Roll or Files. Adjust quality, then tap Download — the compressed JPG saves to your device. No app required.

How do I compress JPG for email?

Use 80% quality to reduce the file size significantly while keeping the photo sharp. Target 500 KB or smaller for attachments — most email providers accept up to 10–25 MB, but smaller attachments load faster for recipients and are less likely to be blocked by spam filters.

What formats does this JPG compressor support?

JPG and JPEG (same format), PNG, WebP, and GIF. All formats output as JPG for maximum compression. If you need to compress PNG specifically, use the PNG compressor.

What is a good JPG compression level?

80–85% is the industry standard for web images — this range cuts file size 40–60% with no perceptible quality loss at normal viewing sizes and speeds. Google PageSpeed Insights and Lighthouse both recommend this range. Below 70% you may start to see compression artifacts around sharp edges and in smooth gradients. For archival or print use, keep quality at 90%+ to preserve maximum detail.

How do I compress a JPG in Photoshop?

Go to File → Export → Export As → select JPEG from the format dropdown → drag the Quality slider. The file size updates in real time so you can see the exact byte count. For more control, use File → Export → Save for Web (Ctrl+Alt+Shift+S on Windows, Cmd+Alt+Shift+S on Mac) — this shows a side-by-side preview at different quality levels. Quality 60 in Save for Web roughly equals 80% quality in other tools due to different scaling.

How do I compress a JPG on iPhone?

Open toolchop.com/jpg-compressor in Safari on your iPhone and tap the upload area to select a photo from your Camera Roll. Adjust the quality slider and tap Download — the compressed JPG saves to your Files app. No app installation required. Alternatively, when emailing a large photo from the iPhone Photos app, iOS automatically offers to reduce the image size (Small / Medium / Large / Actual Size) before sending.

What is the maximum email attachment size?

Gmail and Outlook both allow attachments up to 25 MB per email; Yahoo Mail also allows 25 MB. However, the receiving server may have a lower limit, and large attachments can be flagged by spam filters. A safe target for photo attachments is under 5 MB per image. Use this tool to compress photos to under 1 MB for email — at 1200px wide and 80% quality, most photos land in the 200–500 KB range, well within any limit.