JPG (JPEG) compression is one of the most common image tasks on the web. Camera photos, website images, social media uploads, and email attachments are all typically JPEG files that can be made significantly smaller without visible quality loss. The right approach depends on what you're using the image for — email, web, printing, or archiving all have different optimal settings.

How JPG/JPEG Compression Works

JPEG is a lossy format — it discards image data that the human eye is least likely to notice. When you "compress" a JPEG, you're adjusting how aggressively it discards that data:

Quality 100 — Minimal compression, maximum file size. Almost identical to uncompressed. Rarely needed.
Quality 85–95 — High quality, very little visible loss. Good for archiving and professional use.
Quality 70–85 — Excellent for web and email. At quality 80, a 5 MB camera photo typically becomes 500 KB–1 MB with no visible degradation at normal viewing sizes.
Quality 50–70 — Visible compression at close inspection. Blocks and artifacts appear in high-frequency areas (edges, text, detailed textures). Acceptable for thumbnails.
Quality below 50 — Heavy artifacts, blocky appearance. Only for when file size is critical and quality is secondary.

How to Compress JPG Free

Open Picovert's image compressor — free, no account required.
Drop your JPG or JPEG file (or multiple files for batch compression).
The compressor applies optimized compression — typically quality 80–85 — which removes unnecessary metadata and re-encodes the image at a balanced quality/size ratio.
Download the compressed JPG.

All processing runs in your browser — no files are uploaded to any server.

How Much Can JPG Files Be Compressed?

Typical compression results at quality 80:

Camera photos (10–20 MB RAW): Usually already compressed to 3–8 MB by the camera. Further compression to quality 80 typically yields 1–2 MB — a 50–70% reduction from the camera's output.
Smartphone photos (3–6 MB): Compress to 500 KB–1.5 MB at quality 80. Ideal for sharing without storage waste.
Screenshots saved as JPG: Screenshots have lots of uniform color areas that compress well. A 2 MB screenshot JPEG often reaches 300–500 KB.
Web images (already optimized): If a JPEG was already exported at quality 75–85, re-compressing will show diminishing returns and may introduce generation loss without meaningful size savings.

JPG Compression vs. Resizing: Which Reduces Size More?

Both compression and resizing reduce file size, but they work differently:

Compression — Reduces quality (throws away data). Keeps dimensions the same. Best when you need to display at the same size but want smaller file size.
Resizing — Reduces dimensions (actual pixel count). A 4000×3000 image resized to 1920×1440 has 77% fewer pixels, which directly translates to a ~75% smaller file. Best when the image will be displayed smaller than its source dimensions.

The most effective approach is often resize first, then compress. If you have a 4K camera photo that will appear at 800px wide on a website, resize it to 800px wide, then compress. This way you're not paying storage cost for pixels that are never displayed. Use Picovert's resizer for the resize step.

Should You Compress JPG or Convert to WebP?

For web images, converting to WebP almost always produces smaller files at the same quality:

WebP achieves 25–35% smaller files than JPG at equivalent visual quality.
A JPG compressed at quality 80 is approximately equal in size to a WebP at quality 90 — but the WebP looks visually better.
WebP is supported by all modern browsers. For email and apps that require JPEG, keep JPG.

For web pages: convert to WebP and save the WebP instead of optimizing JPEG. For email and downloads where recipients expect JPEG: compress the JPG.

Removing EXIF Metadata from JPG

JPEG files from cameras contain EXIF metadata: GPS location, camera model, lens settings, shutter speed, and more. This metadata can add 20–100 KB per photo. Compression tools like Picovert strip EXIF data by default, which both reduces file size and protects your privacy (no location data embedded in shared photos).

If you need to strip EXIF without resizing or recompressing, use Picovert's EXIF remover directly.

JPG Compression for Email

Email clients have attachment size limits. Most people hit these limits with uncompressed camera photos. Practical targets:

Single photo for email: Target 200–500 KB. Resize to 1920px wide and compress at quality 80.
Multiple photos (zip attachment): Target 300–500 KB per photo before zipping.
Gmail attachment limit: 25 MB total. A batch of 10 compressed photos at 500 KB each = 5 MB.

For detailed email image guidance, see our image compression for email guide.

Batch JPG Compression

Picovert's compressor handles batch processing — drop multiple JPEG files at once and download each compressed result. Useful for compressing an entire camera roll, product photo batch, or folder of website images in one session.