How much can I compress a JPG without losing quality?

At quality 85%, JPG files shrink 40–60% with no noticeable difference. A 4.2 MB iPhone photo becomes roughly 1.8 MB. The median reduction across files processed on Convertify is 54%.

Is JPG compression lossy?

Yes. It removes visual data that human eyes cannot perceive. At quality 80–95%, the loss is invisible. Below 60%, softening appears on gradients and around text.

What quality setting is best for web?

Many professional image pipelines target 80–85% for web delivery. This balances file size and visual fidelity for screens of all sizes.

Can I compress multiple JPG files at once?

Yes. Upload up to 10 .jpg files simultaneously. Each file compresses with the same quality setting and downloads individually. A full batch finishes in a few seconds.

Does compression remove EXIF data?

No. Convertify preserves EXIF metadata (camera model, date, GPS, focal length) by default. The metadata adds only 10–50 KB.

Is it safe to compress JPG files online?

Yes. Files transmit over encrypted HTTPS, process in memory, and delete immediately after download. No files are stored or shared.

What is the difference between JPG and JPEG?

Nothing. JPG and JPEG are the same format. The three-letter extension exists because older Windows required three-character extensions.

Can I undo JPG compression?

No. Lossy compression permanently removes data. Always keep originals and compress copies.

Convert JPG to JPG Online Free — Fast Batch Conversion

You can upload a maximum of 10 images at a timeDrag & Drop your images here orChoose FileSupported formats: JPG

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How to Convert Images Online

1Upload your JPG files
Drag and drop up to 10 .jpg files onto the compressor, or click Choose File. Maximum 20 MB per file.
2Set compression quality
Move the quality slider to your target. 85% is recommended — it reduces file size 40–60% with no visible quality loss.
3Click Compress
Convertify compresses each file server-side using Rust and mozjpeg-optimized libvips encoding.
4Download compressed files
Download your smaller .jpg files individually. Files delete from the server immediately after download.

Supported Image Formats

JPG

Universal format for photos. Supported everywhere, great balance between quality and file size.

HEIC

Apple photo format used by iPhone and iPad. High quality with small file size.

HEIF

High Efficiency Image Format — same as HEIC, used on Apple devices.

WebP

Modern image format by Google. Up to 30% smaller than JPG with the same quality.

PNG

Lossless format that preserves every pixel. Best for screenshots and logos.

GIF

Classic format for simple animations. Supports transparency and up to 256 colors.

BMP

Uncompressed bitmap format. Maximum quality but very large file size.

TIFF

Professional lossless format used in printing and photography.

AVIF

Next-gen format with excellent compression. Up to 50% smaller than JPG.

PPM

Portable Pixmap format used in Unix/Linux environments.

HDR

High Dynamic Range format storing extended brightness data.

FITS

Flexible Image Transport System used in astronomy and science.

PDF

Portable Document Format. Convert PDF pages to JPG, PNG or WebP images.

AVIF vs WebP vs HEIC vs JPG

Quick comparison to help you choose the right format

AVIF

Size: Up to 50% smaller than JPG
Browsers: Chrome, Firefox, Safari
Transparency: ✓
Best for: Web performance

WebP

Size: 25-35% smaller than JPG
Browsers: All modern browsers
Transparency: ✓
Best for: Web compatibility

HEIC

Size: ~50% smaller than JPG
Browsers: Safari only
Transparency: ✓
Best for: iPhone storage

JPG

Size: Baseline
Browsers: All browsers & apps
Transparency: ✗
Best for: Universal sharing

Frequently Asked Questions

How much can I compress a JPG without losing quality?: At quality 85%, JPG files shrink 40–60% with no noticeable difference. A 4.2 MB iPhone photo becomes roughly 1.8 MB. The median reduction across files processed on Convertify is 54%.
Is JPG compression lossy?: Yes. It removes visual data that human eyes cannot perceive. At quality 80–95%, the loss is invisible. Below 60%, softening appears on gradients and around text.
What quality setting is best for web?: Many professional image pipelines target 80–85% for web delivery. This balances file size and visual fidelity for screens of all sizes.
Can I compress multiple JPG files at once?: Yes. Upload up to 10 .jpg files simultaneously. Each file compresses with the same quality setting and downloads individually. A full batch finishes in a few seconds.
Does compression remove EXIF data?: No. Convertify preserves EXIF metadata (camera model, date, GPS, focal length) by default. The metadata adds only 10–50 KB.
Is it safe to compress JPG files online?: Yes. Files transmit over encrypted HTTPS, process in memory, and delete immediately after download. No files are stored or shared.
What is the difference between JPG and JPEG?: Nothing. JPG and JPEG are the same format. The three-letter extension exists because older Windows required three-character extensions.
Can I undo JPG compression?: No. Lossy compression permanently removes data. Always keep originals and compress copies.

Why are your JPG files so large?

Cameras and phones save JPG at quality 95–100% by default. A 4000×3000 photo from an iPhone 15 is typically 4.2 MB. A DSLR shot at full resolution can hit 15–20 MB. That quality ceiling wastes bytes on detail human eyes cannot perceive.

Recompressing at quality 85% strips only the imperceptible data. The file shrinks 40–60% while the image is virtually indistinguishable from the original. This is not format conversion — your .jpg stays .jpg, only the file size changes.

How mozjpeg optimization works

Standard JPEG encoders leave performance on the table. Convertify uses libvips with mozjpeg-optimized encoding — the same pipeline Mozilla built for Firefox.

mozjpeg applies trellis quantization and progressive scan optimization to squeeze 5–15% more savings at the same quality level compared to baseline JPEG. A file that a standard encoder compresses to 1.8 MB at Q85 becomes 1.5 MB with mozjpeg — free savings with no additional quality loss.

Across 12,000+ JPG files processed on Convertify, the median reduction at Q85 is 54%.

Real compression results

4.8 MB DSLR photo (6000×4000) → 1.9 MB at Q85 — 60% smaller.

3.1 MB iPhone portrait (4032×3024) → 1.4 MB at Q85 — 55% smaller.

780 KB WhatsApp-forwarded photo (1600×1200) → 310 KB at Q80 — 60% smaller.

2.4 MB product photo for Shopify (2048×2048) → 980 KB at Q85 — under the 1 MB upload recommendation.

Drop your photos above and compare the file sizes yourself.

JPG compression vs resize vs format change

These three operations serve different purposes:

Compress: same dimensions, same format, smaller file. A 4000×3000 photo stays 4000×3000 but drops from 4.2 MB to 1.8 MB. Use when you need .jpg output.

Resize: changes dimensions. A 4000×3000 photo becomes 1920×1440. File gets smaller because there are fewer pixels. Use when the target display is smaller than the original.

Format change: JPG → WebP or JPG → AVIF. Different encoding, potentially much smaller. Use when the receiving platform supports modern formats.

For smaller JPG files without changing anything else, compression is the right tool. For web delivery where format does not matter, convert to WebP (25–35% smaller) or convert to AVIF (35–50% smaller).

EXIF metadata handling

EXIF stores camera model, focal length, ISO, GPS coordinates, and timestamps. Many online compressors strip this data silently — breaking photo organization and copyright attribution.

Convertify preserves EXIF by default. The metadata adds only 10–50 KB — negligible next to a 40–60% file size reduction.

If you need to remove GPS data before sharing photos publicly, strip EXIF separately. That is a privacy decision, not a compression setting.

Privacy and file handling

Files upload over encrypted HTTPS. Processing happens in memory — no disk storage, no content logging. After download, files delete immediately.

No account. No watermarks. No daily limits — batch up to 10 files at once, as many times as you need. Your photos never touch a third-party API or an AI training pipeline.