Make a flat or oddly coloured image feel right
Correct the temperature, lift a dark image, restore contrast and keep skin tones believable. Export the finished photo at its original size.
Free · private · works in your browser
Make it look
the way it felt.
Nyans is a colour grader for photos, video, screenshots and renders. Fix a strange colour cast, recover contrast, match a set of shots or give the whole thing a mood. Start with familiar controls, then go deeper if you want to. Your files stay on your device.
Chrome, Edge, Firefox and Safari · desktop or phone
- Price
- Free no watermark
- Uploads
- 0 bytes
- Made for
- Photos video & renders
- Experience
- Any start with one panel
What you can do
Start with the picture, not the file format
You do not need to know what a LUT is. Bring something that needs better colour and Nyans gives you a clear place to work on it.
Grade while the clip plays
Play, pause and scrub while every change stays live. Build a clean, warm, muted or cinematic look, then render the graded clip with its audio.
Make different shots belong together
Put several photos, clips or screenshots side by side. Balance each one, then shape one shared look while the whole set updates.
Set the mood before you publish
Polish game captures, artwork, product renders and social images. Protect an important brand colour while you change everything around it.
Use a reference as a starting point
Choose a still, photograph or piece of concept art whose colour you like. Auto match finds a broad starting point and leaves ordinary controls for you to adjust.
Apply the same look somewhere else
Save the grade as a preset, share it in a link or export a LUT when another app needs one. The technical formats are there when you need them—not before.
Grading tools
Familiar controls, with room to grow
Start with brightness, contrast, white balance and colour. Add curves, wheels or selective tools only when the picture asks for them.
Many shots, one look
Load images from different scenes and lighting conditions. Every thumbnail follows the grade, so you can spot a weak black, clipped highlight or strange skin tone before it slips through.
Balance one shot without changing the others
Correct the exposure or camera colour of one shot, then keep shaping the shared look across the set. Nyans keeps those two jobs clearly separated.
The controls you expect
White balance, exposure, contrast, highlights, shadows, whites, blacks and saturation are ready from the start. Curves, colour wheels, the HSL mixer and split toning are there when you want more control.
Pick by picture, not by name
Try forty starting looks—from subtle film colour to day for night—shown on your own image. Adjust one or save your own for the next project.
Get to a useful starting point
Auto balance makes a conservative first pass at colour, brightness and contrast. Auto match takes inspiration from a reference image. Both leave normal, editable controls behind.
Change one colour without chasing the rest
Pick a colour from the picture, narrow the selection and change only that area. Useful for skin, skies, foliage, clothing and brand colours.
Keep grading on top of a LUT you like
Load a .cube as a creative node with its own strength control. It starts after the tone controls, but you can move it anywhere in the stack or add another. Export bakes the complete stack into one LUT.
Saturation on a curve, not a band
Smooth saturation-versus-saturation and luma-versus-saturation curves, alongside the 8-band hue mixer. Take saturation out of the highlights, or only out of what is already vivid, without disturbing anything else.
Pull every shot toward one of them
Pick the shots, mark a reference, then scribble over colours to preserve and materials to adjust. Harmonize creates a separate trim node for each shot and leaves the shared look alone. The run is one undo step. Export texture fixes produces a standalone .cube and HALD for each asset.
Key one colour and grade only that
Pick from an image or video frame, then narrow and feather the hue, saturation and luminance ranges separately. View the selection as a black-and-white matte or an overlay, refine it and invert it if needed. The qualifier is colour-based and can be baked into the LUT.
Every shot at once
Put the whole selection side by side. Each cell runs through the full pipeline and has its own before view, wipe, zebras and matte. Shared zoom and pan keep the same part of every frame aligned for comparison.
Pin the colours that must not move
Lock a team red, a UI colour or a skin tone. Nyans measures its drift as you grade, flags it in the panel, and includes it as a constraint during Auto match.
For 3D artists
There is a deeper workflow for 3D assets
Drop a model into the same filmstrip, grade its material colour maps before lighting, and pull a kit of mismatched assets into agreement. This specialist workflow now has a page of its own.
Forty-odd scene formats
glTF and GLB open directly. FBX, OBJ, DAE, BLEND, PLY, STL, 3DS, PMX and the rest are converted to glTF 2 inside the tab by an Assimp build compiled to WebAssembly. A zipped folder brings its textures, .bin and .mtl along with it.
Applied before the lighting
Base colour and emissive maps go through the grade, and the scene lights the result. That is the order a texture fix has to be applied in, so what you judge on screen is what the exported transform does to the maps themselves — no baked-in key light, no view-dependent shading.
Orbiting doesn't move the numbers
The scopes, Auto match, Auto balance and Harmonize all sample the model's colour textures rather than the rendered viewport. Turn the model around and the histogram, the ΔE figures and the solved trim stay where they were.
Pull a kit into agreement
Put several assets on the board, mark one as the reference, and Harmonize solves a trim for each of the others without touching the shared look. Export texture fixes then writes a 33³ .cube and a HALD PNG per asset, plus the ImageMagick lines that apply them to that asset's own maps. The whole workflow, step by step →
The model comes back with the project
Models are kept in the browser on your machine when there is room, and the filmstrip says which ones are stored and which are session-only. A .nyans project carries the whole package — scene, textures and all.
Beside the stills and the clips
A model sits in the filmstrip next to screenshots, RAW files and video, under one look. Before/after, the wipe, the qualifier matte and grid view all work on it, so a look can be judged against captures and assets in the same pass. The quantized bake preview stays on the flat shots, where the LUT is what gets applied.
How it works
One simple panel. More control when you need it.
A new project opens with one Basic Grade panel. Underneath, Nyans keeps the work organised so you can add tools, rearrange them or turn them off without losing your way.
Add only what the picture needs
Begin with the essentials. Add curves, selective colour, an HSL mixer or split toning as separate steps when the grade calls for them.
Experiment without painting yourself into a corner
Move a step, use the same tool twice or switch one off to see what it contributes. The whole arrangement is saved with your look.
Know what changes one shot and what changes them all
The panel separates the shared look, fixes for one shot and finishing effects such as grain. You always know which part of the project you are changing.
Save & share
Finish here, or take the look with you
Export a finished photo or video, save the whole project, send someone the look in a link, or make a LUT for another creative app when your workflow needs one.
| Format | Shape | Reads it |
|---|---|---|
| .cube | 16³ / 32³ / 65³ | DaVinci Resolve, Premiere Pro, Final Cut Pro, Photoshop, OBS, CapCut. Size ceilings vary: After Effects reads 64 points per axis or fewer, so give it the 16³ or 32³ |
| .3dl | Autodesk 3D LUT | Flame, Lustre, Nuke, older broadcast pipelines |
| Unreal strip | 256 × 16 PNG | Unreal Engine 4 & 5 colour grading LUT slot |
| Unity strip | 1024 × 32 LDR PNG | Unity post-processing / URP / HDRP |
| ReShade | lut.png | ReShade injector on any game |
| HALD CLUT | 512 × 512 PNG | ImageMagick, G'MIC, batch texture pipelines |
| PQ shaper .cube | Pre-tonemap HDR | OCIO and custom engine pipelines that grade before the tonemapper. Stock Unreal and Unity LUT slots use the LDR strips above; ACES projects use an ACES output transform |
See the banding before you export it
Switch between the float grade and the baked 16³, 32³ or 65³ LUT. Banding and interpolation error show up in the same viewer you used to build the grade.
Grade in ACES, or don't
Choose Display sRGB for the original Nyans pipeline or Scene-linear ACES for an ACEScg working space with ACEScct grading controls. ACES uses the official 2.0 output transforms and gamut mapping throughout the preview, scopes, probe, matching and LUT bake. The extra runtime loads only for ACES projects.
Render the finished clip
Save the active clip at its original dimensions with its audio intact. Nyans shows progress and keeps everything on your machine.
Full-resolution PNGs
Save a graded image at its original dimensions. If you added bloom, halation, grain or a vignette, you can render those into the finished pixels too.
The LUT says what it expects
Set the expected input and output to sRGB, Display P3, Rec.709 or Rec.2020. Nyans bakes that conversion into the values and writes both spaces as comments in the .cube header; the format has no standard colour-space field. Camera-log transforms are selected per shot. Input transforms, exposure and shot trims remain outside the reusable LUT.
A link that carries your colour
Send the grade settings in a URL. The other person gets the look, not your private source images.
Pick up where you left off
Save one portable Nyans project with the grade, images and project settings inside. Open it on another machine or hand the work to someone else.
A report with the numbers in it
Add a printable report and machine-readable JSON to any delivery. It records the transform details, gamut excursions, clipping, folds, volume, LUT bake error, per-shot ΔE and colour-lock drift. Offline shots are identified and excluded from the reported averages.
For colour pipelines
LUT tools are still here—just out of the way
If LUTs are part of your job, LUT Lab can inspect, compare, repair, resize, blend and batch them. Everyone else can happily grade without ever opening it.
Domain, excursions and folded cells
Read the input domain, output excursions and folded or singular cells from the LUT values. Source and result can be viewed as colour slices, with their difference drawn as a ΔE heatmap on a fixed scale.
Preserve the original range
Custom domains and values outside 0–1 survive an ordinary round trip. Repair tools can clamp excursions, smooth isolated spikes and remove folds; each reports the change in look strength. Approximate inversion includes a reconstruction-error measurement and marks folded LUTs as non-invertible.
Change a LUT without rebuilding it
Resize the grid, blend the LUT from 0 to 200%, or compose it before or after a second LUT. Download the result, stack it, or turn it back into controls you can edit.
Channel curves, kept as curves
A one-dimensional .cube opens in its own editor with the input and output curves drawn over the source. Per-channel domains, descending runs and flat segments are reported, and nothing is quantized. Converting one into a 3D lattice states the resulting error instead of hiding it.
One recipe over a folder of LUTs
Drop in many .cube files and set the output format, size, strength and repair once. Each file is processed on its own and a file that fails does not stop the rest. The download keeps all the results together with a summary of any warnings.
Three readings of the same file
A .cube dropped into the app can be opened in LUT Lab, stacked as a creative node you keep grading on top of, or fitted back to the knob stack. Nyans asks rather than guesses. Whichever you pick, the finished stack still exports as one LUT.
What you can open
Bring the files you already have
Drag in everyday photos and screenshots, camera originals, HDR images, video clips or 3D models. Nyans handles the technical preparation and gives you one consistent place to grade.
- 01Photos & screenshotsOpen PNG, JPEG and AVIF files one at a time or as a folder. They are ready to grade immediately.
- 02Camera RAWBring originals from Sony, Canon, Nikon, Fujifilm, Olympus, Panasonic and other cameras. Nyans starts from the camera's own white balance and colour information.
- 03VideoMP4, MOV and WebM clips play in the grader. Scrub or step through frames while the controls stay live, then render the result at the original size.
- 04Log footageChoose the matching Apple, ARRI, Canon, Panasonic, RED or Sony camera profile and Nyans prepares the flat footage for grading without changing your shared look.
- 05HDR imagesOpenEXR, Radiance HDR and high-bit-depth AVIF are handled without flattening their extra range before you begin.
- 063D modelsOpen glTF, GLB, FBX, OBJ, BLEND and many other scene files. The focused 3D workflow grades the material colours before lighting.
Histogram, parade, waveform, vectorscope
Each scope includes clipping warnings and a before/after pixel probe; the vectorscope also has a skin-tone line. Colour-vision-deficiency simulation covers protanopia, deuteranopia and tritanopia.
Clearly separated from the LUT
Bloom, halation, grain and vignette depend on neighbouring pixels, frame position or randomness, which a 3D LUT cannot store. Nyans previews them in a separate render lane. Stills and clips can render the effects into pixels, and engine exports include a recipe for the closest Unreal, Unity or ReShade settings.
Close the tab, come back, keep grading
Shots, masks and grades are stored in the browser on your machine. To move a project, save a .nyans file and open it on the other device.
Why free
Free because your machine does the work.
Nyans serves the application; your browser handles the decoding, grading and local storage. That leaves no per-user compute or footage-storage bill for the site to recover.
Free is the product, not a limited tier. Every export format and LUT size is available from the first visit.
- Account. Not required. Open the tab and start grading.
- Exports. LUTs contain the numbers you graded, with no watermark, size limit or export count.
- Optional assistant. If you already use a compatible AI assistant, you can connect it to the open grader for help reading scopes and operating controls. Nyans does not call or resell a model.
- Portability. Grades fit in a link, projects save as files, and
.cubeLUTs remain plain text. - Offline use. An open session keeps grading without a connection. The RAW decoder and the ACES runtime are fetched the first time they are used, so they need one visit while online.
FAQ
Practical questions
Is Nyans really free?
Yes. All controls, LUT sizes and export formats are available for free. Nyans has no account system, subscription or watermark. The application runs in your browser, so the site does not pay to process or store each user's footage.
Are my images uploaded anywhere?
No. Your browser opens the files, applies the grade and writes the LUT locally. Share links contain grade settings only; source images and clips are left out.
What LUT formats can I export?
.cube at 16³, 32³ or 65³, .3dl, an Unreal Engine 256×16 strip, a Unity 1024×32 LDR strip, a ReShade lut.png, a 512×512 HALD CLUT, and a PQ shaper .cube for pre-tonemap HDR in OCIO and custom pipelines. Stock Unreal and Unity LUT slots use the LDR strips. You can bundle several formats into one zip.Does it work with DaVinci Resolve and Premiere Pro?
Yes.
.cube is the standard 3D LUT format read by DaVinci Resolve, Premiere Pro, Final Cut Pro, Photoshop, OBS and CapCut. After Effects accepts up to 64 points per axis, so use a 16³ or 32³ export there; Resolve can use 65³. Lightroom expects a profile and does not import .cube files directly.Can I edit a LUT I already own?
Yes. Reverse fit sets the grading controls to approximate any 3D
.cube and reports the reconstruction error. You can also load the file as a creative node with a strength slider. In either case, the finished stack exports as one LUT.Is it colour managed? Does it do ACES?
Yes. Each project uses Display sRGB or Scene-linear ACES. The ACES pipeline grades in ACEScg through ACEScct and uses the official ACES 2.0 output transforms and gamut mapping for the preview, scopes, probe, colour locks, matching and LUT bake.
LUT input and output can be set to sRGB, Display P3, Rec.709 or Rec.2020. The conversion is baked into the values and written as plain-language comments because
.cube has no colour-space field.
There are twelve per-shot OpenColorIO camera-log transforms covering Apple, ARRI, Canon, Panasonic, RED and Sony. Blackmagic and DJI transforms are not included yet. The same applies to ACES2065-1 interchange, ACES HDR output transforms, ICC output profiles and CLF/CTF/AMF round trips. For Rec.2020 SDR output, Nyans uses the official P3-D65 render gamut in a Rec.2020 container; ACES 2 has no native SDR Rec.2020 preset.Can I inspect, resize or combine a LUT I already have?
Yes. LUT Lab opens a 3D
.cube as float data and reports its input domain, output excursions and folded or singular cells. It can resize the grid, blend from 0–200%, compose two LUTs, clamp excursions, smooth isolated spikes and remove folds. A fixed-scale ΔE heatmap compares source and result. Custom domains and values outside 0–1 are preserved unless you select a repair that changes them.
One-dimensional .cube LUTs open in their own curve editor and can be converted to a 3D lattice with the conversion error measured. Dropping several files at once opens a batch: one recipe runs over every file and downloads the results together with a summary of any warnings.Can I grade a 3D model?
Yes. Drop a glTF, GLB, FBX, OBJ, DAE, BLEND, PLY, STL or zipped scene into the filmstrip and it becomes a shot with an orbit camera. The grade is applied to the material colour and emissive textures before the scene lights them, so it does not bake the lighting in. Scopes, matching, Auto balance and Harmonize read the model's textures rather than the rendered view, so the numbers do not change when you move the camera. Export texture fixes writes a 33³
.cube and a HALD PNG per asset, with the ImageMagick commands to apply them.Why can't grain, bloom and halation be baked into the LUT?
A 3D LUT maps one input colour to one output colour. Bloom and halation need neighbouring pixels; grain and vignette also depend on frame position or randomness. Nyans keeps these effects in a labelled render lane and can commit them to exported stills and clips. Game-engine exports include the nearest Unreal, Unity or ReShade settings and identify effects with no stock equivalent, including halation.
Can an AI grade for me?
Yes, through the Model Context Protocol. An assistant can render a shot, inspect it, read the scopes and operate named controls or nodes in the open tab. Nyans holds no API key and calls no model; the connection uses your existing Claude, ChatGPT or other MCP-client subscription.
Can I save a project and open it on another machine?
Yes. Save creates one portable
.nyans file containing your grade, project settings and original media. Video is included by default, or you can make a smaller save without the clips.Can I reorder the controls, or use two of something?
Yes. Nodes can be reordered, duplicated, renamed and bypassed. A new project starts with one Basic Grade panel, and more rows appear as you add tools. The Look lane is baked in stack order. Per-shot development and film response have separate lanes because they are outside the LUT bake.
What do I need to run it?
A current version of Chrome, Edge, Firefox or Safari, on desktop or phone. The app needs WebGL2, which every mainstream browser has shipped for years.