The refining — to perfect and make whole through careful work. The word is a compound of two parts: Sam (सम्), meaning "together", "completely", or "well"; and Kru (कृ), meaning "to do", "make", or "accomplish".
सं + √कृ · to refine, to perfect
100% Private · On-device
Export options
Rotate & straighten
Angle0°
−180−90090180
Auto enhance
Intensity65%
Private RAW Photo Editor
Develop your photographs — privately.
A complete RAW editor that runs entirely in your browser. Tap Import above to open a photo.
Private by designOn-device only — no uploads, no accounts.
Professional RAWARW, NEF, CR2, DNG & more — full tone control.
Subject isolationEdit subject and background as separate layers.
Non-destructiveUnlimited undo; export JPEG or PNG at full res.
Tap Import in the top bar and choose a JPEG, PNG, or RAW file (ARW, NEF, CR2, CR3, DNG and more). Large images are previewed at reduced size for speed; export always renders at full resolution.
2 · Make global adjustments
Use the panels on the right (or the bottom sheet on mobile) for exposure, colour, tone curves, detail, effects, and crop. Tap Auto in the action bar for a one-tap starting point — pick Portrait or Landscape if it guesses wrong.
3 · Isolate the subject
Open the Subject tab and tap Auto-Detect Subject. If detection misses, Brush roughly over the subject or draw a region, then fine-tune with the detection sliders. Once a mask exists, the Subject and Background layers can be edited separately.
4 · Retouch skin & eyes
Open the Retouch tab.
Pick a tool — Heal (remove blemishes), Smooth (soften skin), or Eyes (brighten). The brush turns on automatically.
Tap a spot or drag over an area directly on the photo.
Adjust Size and Strength; use Undo last or Clear all as needed.
Prefer one tap? Auto Improve softens skin across the whole frame at a gentle strength.
5 · Crop & straighten
Tap the Crop tool in the action bar, drag the handles to frame your shot, and pick an aspect ratio from the bar at the bottom — 1:1, 16:9, 9:16, 4:3 and more. Free removes the constraint. Rotate and straighten live in the Crop & Rotate panel.
6 · Export
Tap Export and choose JPEG, PNG, or TIFF. The file saves straight to your device — nothing is uploaded.
Zoom & pan
While brushing or retouching: pinch to zoom and drag with two fingers to pan (scroll to zoom on desktop). Double-tap to reset the view.
RAW developing
Reads embedded full-size previews from RAW files and gives full tone control — exposure, highlights, shadows, whites, blacks, curves, white balance, HSL, colour grading, clarity, dehaze, sharpening, noise, vignette and grain.
Subject isolation
Automatic subject detection with brush and region guidance, plus advanced sliders (Saliency, Detail, Sensitivity, BG Pinning, Edge Snap) and a manual mask touch-up brush. Subject and background become independent editing layers.
Retouch
Content-aware Heal that samples clean skin nearby, frequency-separation Smooth that keeps pores, and an Eyes tool for brightening — all non-destructive and undoable.
Auto enhance
One-tap tone, colour and white-balance correction that adapts to the image, with a manual Portrait/Landscape override and an intensity that stays natural.
Non-destructive workflow
Up to 60 steps of undo/redo, before/after compare, presets, and crop & straighten — your original is never altered.
Private by design
The entire editor runs in your browser. No uploads, no accounts, no tracking.
On-device processing
Every pixel operation runs locally in JavaScript on a canvas. For responsiveness, edits preview on a downscaled proxy; on export the same operations replay against the full-resolution image.
Subject detection
Detection combines a saliency/colour model with multi-scale edge operators and label propagation in CIELAB colour space. A brush stroke acts as a hard outer boundary so the mask refines to edges inside what you painted without leaking into a similar-coloured background. The sliders expose the knobs of this pipeline: Saliency (how distinct a pixel must be to count as subject), Detail and Sensitivity (edge tracing), BG Pinning (how tightly the mask hugs your strokes), and Edge Snap (how strongly real contours block the fill).
Retouch tools
Heal searches nearby for a clean, low-variance donor patch, colour-matches it, and blends it over the target with a feathered edge — real texture, not blur. Smooth and Eyes use frequency separation: the image is split into low-frequency (colour) and high-frequency (pore) detail so softening or brightening can be applied while keeping texture.
Auto enhance
Auto samples a luma histogram and midtone colour means, then derives black/white points from robust percentiles (not raw min/max). It classifies the frame, aims the upper-midtone toward a sensible highlight target, applies grey-world white balance, and brakes every "punch" operation when the frame is already bright so highlights aren't blown.
Common issues
Retouch isn't changing anything
Picking a tool (Heal/Smooth/Eyes) turns the brush on automatically — the button should read Retouch off, meaning it's currently active. Tap or drag directly on the photo. Increase Strength and Size if the effect is too subtle, and zoom in for precise work. Heal needs clean skin nearby to sample from; over a large flat area, try Smooth instead.
Auto enhance looks too strong
Lower the Auto intensity in the action-bar Auto menu, or fine-tune individual sliders afterward. Auto only sets a starting point — every value remains editable.
Auto picked the wrong orientation
Open the Auto menu and choose Portrait or Landscape explicitly instead of Auto, then re-run.
Subject detection leaks into the background
Brush over the subject so detection is confined to your strokes, then raise BG Pinning and Edge Snap. When subject and background share a colour, paint out to the rim and use the mask touch-up brush to clean edges.
A RAW file won't open
Samskuru reads the embedded JPEG preview inside RAW files. A few cameras omit a full-size preview; try exporting a JPEG/TIFF from your camera software, or use DNG.
Export is slow or the tab feels heavy
Full-resolution export processes every pixel and can take a moment on very large files — this is normal. Close other heavy tabs if your device is low on memory.
My edits disappeared
Use Undo (Ctrl/⌘+Z). Note that closing the photo or refreshing the page clears the session — nothing is stored remotely by design.