The catalogue · 60 tools
60 free tools for artists
Every tool runs entirely in your browser, and none of them uploads your images. Browse by collection or search by what you want to do.
Value & Tone
14 tools
Value and Tone Tools for ArtistsValue & Tone
Value Checker
See any image in true perceptual grayscale, read values on the 1–10 artist scale, and compare your painting to its reference.
Value & Tone
Value Study Maker
Posterize any photo into 2–10 clear value steps with custom thresholds, ready to plan or paint from.
Value & Tone
Notan Generator
Turn any photo into a 2- or 3-value notan study to plan strong light–dark composition before you paint.
Value & Tone
Image Simplifier
Strip photo noise and fussy detail so you can see the big shapes, colors and values worth painting.
Value & Tone
Photo to Line Art
Convert any photo into clean, trace-ready outline art with adjustable line weight and detail.
Value & Tone
Drawing Accuracy Checker
Overlay a photo of your drawing on the reference to catch proportion and placement errors early.
Value & Tone
Live Camera Studio
A live grayscale camera for painters: value, notan and warm/cool views, two value probes, a canvas viewfinder and frames sent to other tools.
Value & Tone
Black Mirror (Claude Glass)
A Claude glass for photos or your live camera: a painterly curve or the physics of black glass, with convex curvature.
Value & Tone
Value Range Compressor
Re-key a photo into your medium's real value range, measured from your swatches, with pinned values, local contrast and a numbered map.
Value & Tone
Value-to-Pencil Grade Mapper
Label each value region with the graphite pencil grade that makes it, on a value scale calibrated from a swatch sheet you fill.
Value & Tone
Value Key Analyzer
Read a painting's key, span and value masses, per region and depth plane, and its drift from the reference.
Value & Tone
Underpainting Generator
Grisaille, brunaille or verdaccio from any reference, each value step a real paint mix, planned pass by pass.
Value & Tone
Glaze Layer Simulator
Preview glazing in oil or acrylic painting: stack glazes and scumbles of 22 pigments over a photo, each mixed with Kubelka-Munk over the layer beneath.
Value & Tone
Depth & Planes Viewer
A picture's depth, estimated on your device, as flat planes under a movable light, three bands of distance and an aerial perspective preview.
Color
17 tools
Color Tools for ArtistsColor
Color Palette Extractor
Pull the real palette out of any image (proportions, values and color codes included) and export it anywhere.
Color
Paint Mixing Simulator
Mix real artist pigments by parts and see the color you would actually get on the palette, then find recipes for any target.
Color
Color Wheel & Harmony Tool
A painter's RYB wheel and a digital OKLCH wheel in one: explore harmonies and check the values behind them.
Color
Limited Palette Previewer
Preview how your reference would look painted with a Zorn or any limited palette, mixing gamut included.
Color
Tint, Shade & Tone Generator
Generate tints, shades and tones of any color: digitally or the way real paint would mix them.
Color
Color Temperature & Saturation Map
See where your reference runs warm or cool, saturated or quiet: the maps painters squint for.
Color
Hue / Value / Chroma Separator
Split any image into value-only, hue-only and chroma-only views: the Munsell way.
Color
Munsell Color Converter
Hex and RGB to approximate Munsell notation, with nearest-chip display and honest limits.
Color
Skin Tone Mixing Guide
Click the light, halftone and shadow on a portrait reference and get paint recipes from your palette.
Color
Complement Neutralizer
Find the paint or mix that neutralizes any color to a gray of the value you choose.
Color
Color Isolator
Click a colour to see everywhere else that mix appears, or keep one hue family in colour while the rest goes gray.
Color
Color Blindness Simulator for Artists
See your image or palette through protan, deutan and tritan eyes, with clash warnings.
Color
Simultaneous Contrast Lab
The same patch on different surrounds. See and export the classic teaching card.
Color
Masterwork Palette Library
Palettes of 30 public-domain masterworks, 4 to 12 colours with their shares, browsable by artist, period and museum.
Color
Palette Format Converter
Convert a palette between ASE, ACO, GPL, Procreate, Clip Studio, ACT, PAL, Paint.NET, CSS, JSON, SVG and PNG, in your browser.
Color
Pigment Encyclopedia
A pigment database by tube code: what each pigment is, the paints made of it, and their maker's own permanence, opacity and granulation, with sources.
Color
Photo to Paint Recipe Sheet
A reference's main colours, each with a mixing recipe from one set of paints, how close it comes, and what those paints cannot reach. One printed page.
Practice & Train
17 tools
Drawing Practice ToolsPractice & Train
Gesture Drawing Timer
Timed gesture and figure drawing sessions with your own reference images, class-mode sequences and fullscreen focus.
Practice & Train
Drawing Prompt Generator
Hundreds of hand-written drawing prompts by subject, medium and difficulty, with a fresh prompt of the day.
Practice & Train
Art Challenge Generator
Build a 7-, 14-, 30- or 100-day art challenge with a theme and difficulty ramp, printable as a calendar.
Practice & Train
Light & Shadow Form Studio
A shading reference you can light: move a lamp around 3D forms and see highlight, light side, core shadow, reflected light and cast shadow, labeled.
Practice & Train
Drawing Scale & Enlargement Calculator
Scale any reference to any canvas or paper size and convert every measurement, proportion locked.
Practice & Train
Master Study Mode
A master study in stages: a museum painting, lenses, plumb and level lines, a clock, and a photo check of your copy for drift and value.
Practice & Train
Classical Figure Reference Sessions
Figure drawing reference from the museum: sculpture, anatomy, drapery and master drawings, each credited, with plans for long poses and cast drawing.
Practice & Train
Memory Drawing Trainer
Study a picture, let it hide, draw it from memory, then compare. The study time shortens as you improve, and a photo of the drawing can be measured.
Practice & Train
Blind Contour Timer
A calm timer for blind contour drawing: pure blind, timed glances, continuous line or other hand, with the subject shown large. Nothing is uploaded.
Practice & Train
Value Perception Drill
Six value tasks scored on the 1 to 10 scale: each answer comes back with its direction, and your lean in darks, mids and lights. Nothing is uploaded.
Practice & Train
Color Mixing Drill
Match a target color by mixing named paints by parts. Each mix is scored by color difference and told which way it is out: too light, too cool, too grey.
Practice & Train
Proportion Drill
Judge lengths, midpoints, angles, plumb and level by eye. Each answer is scored against the drawn geometry, with the direction you were out.
Practice & Train
Line & Ellipse Drill Sheet Generator
Printable warm-up sheets, new each time: ghosted lines, hatching boxes, ellipses at stated degrees, curves and tapers. A4, Letter or A3 PDF.
Practice & Train
Perspective Box Drill Generator
Printable box drawing practice: boxes turned at random to finish, copy or follow as they turn, each sheet with an answer page for checking.
Practice & Train
Practice Log & Streaks
Log practice sessions and see the year as a heatmap, the weeks against your goal and a streak that allows rest days. Kept on your device.
Practice & Train
Sketchbook Prompt Jar
Sketchbook prompts on cut-out slips: choose medium, subject and difficulty from 603 prompts, add your own, and print a jar with its label.
Practice & Train
Calligraphy Guideline Generator
Printable calligraphy guide sheets set by your nib width: x-height, ascender, descender and slant lines for broad-edge and pointed-pen hands.
Photograph & Prepare
12 tools
Artwork Photo ToolsPhotograph & Prepare
Large Print Tiler
Print any image at true size across as many A4 or Letter pages as it takes, with overlaps and alignment marks.
Photograph & Prepare
Artwork Photo Straightener
Fix the perspective of a photo of your artwork so it is flat, square and true to its real proportions.
Photograph & Prepare
Crop to Canvas Size
Crop an image to the aspect ratio of your canvas or paper, so your reference has the surface's exact proportions before you start drawing.
Photograph & Prepare
Artwork White Balance & Color Fix
Correct the color of artwork photos with one click on a neutral area, plus exposure and level controls.
Photograph & Prepare
Background Remover
Remove photo backgrounds on your device with an on-device model: no uploads, no sign-up.
Photograph & Prepare
Art Metadata Editor & AI Opt-out Tagger
An image metadata viewer and editor: see what a photo file says about you, remove location or camera data, and write in your rights and AI-training choice.
Photograph & Prepare
Competition Submission Exporter
Export your art images to an open call's pixel size, file-size limit and file names, with a measured pass or fail for every file.
Photograph & Prepare
Reference Shadow/Highlight Recovery
Lift a reference photo's shadows and calm its highlights area by area, with values read before and after and what is truly lost marked.
Photograph & Prepare
Artwork Photo Color-Accurate Export
Convert artwork photos to sRGB: the file's profile named, colors that did not fit shown, sized and sharpened for web or print.
Photograph & Prepare
Photo Upscaler for Prints
An image upscaler for artwork photos, 2× or 4× for print: a faithful resample beside a model that keeps your marks, a loupe, the print size stated.
Photograph & Prepare
Artwork Scanner (Multi-Shot Stitch)
Join 2 to 9 overlapping photos of a large artwork into one flat picture: matched by their detail, exposure balanced, nothing invented.
Photograph & Prepare
Sketch Cleaner
Clean a photographed or scanned sketch: lighting evened, paper made white, your own marks kept as greys or pure line, as PNG or SVG.