Frequency separation splits an image into two layers: the low frequency layer (color, tone, and smooth gradients) and the high frequency layer (texture, pores, fine details). This allows you to smooth skin tones without destroying natural texture — the industry-standard technique used by professional retouchers worldwide.

Upload your photo, then adjust the Blur Radius to set the separation point. The tool applies Gaussian blur to create the low-frequency layer and subtracts it from the original to isolate high-frequency details. Use your mouse or finger to paint over uneven skin areas — the low-frequency layer gets locally smoothed while texture remains intact. Download your retouched result as PNG.

For most portraits (600–800px wide), a radius of 10–20px works well. A smaller radius (5–10px) preserves more fine detail but may not smooth tones enough. A larger radius (25–50px) aggressively smooths colors but can blur the separation of texture. Start at 15px and adjust to taste. The ideal radius blurs skin texture completely while keeping facial features recognizable in the low-frequency preview.

This is normal and correct! The high-frequency layer is computed as Original − LowFreq + 128, centering values around middle gray (128). This layer contains only texture details — pores, fine lines, fabric weave — while color information lives in the low-frequency layer. When recombined (LowFreq + HighFreq − 128), the original image is perfectly reconstructed. This gray appearance is exactly what professionals see in Photoshop.

A simple blur tool smudges everything — texture and color together — resulting in a plastic, unnatural look. Frequency separation lets you smooth only the tones while preserving every pore and hair. The result is natural-looking skin that retains its character. This is why frequency separation has been the gold standard in beauty and fashion retouching for over a decade.

No. Everything runs 100% in your browser using HTML5 Canvas and JavaScript. Your image never leaves your device. No data is sent to any server, no cookies track your usage. This is a fully client-side tool — you can even disconnect from the internet after loading the page and it will continue working perfectly.

① Start with a moderate blur radius (12–18px). ② Use a brush size that covers the uneven area comfortably. ③ Paint with short, light strokes — don't overdo one spot. ④ Toggle between Result and Original view frequently to check your progress. ⑤ For delicate areas (under eyes, around nose), reduce brush size and strength. ⑥ Remember: the goal is natural improvement, not perfection. Real skin has variation.