Free game dev tools

Pick a mood, roll names, shortlist the ones you like and search itch.io and Steam to see whether the name is already in use.

Upload a texture, adjust the strength and move the light over the lit preview to see how the bumps react. Then download the normal map. It is a quick approximation from brightness.

Pick a style and roll fifteen names. Use them for NPCs, shopkeepers and enemies, and search the store before using one for a main character.

Pick a scope, your experience and the features you want, then enter the hours you can work per week. You get an honest range in hours, weeks and months.

Add your items and weights. The table shows the chance of each drop, how many tries it takes on average and the odds of seeing one within a number of tries.

A 60 FPS game has about 16.7 milliseconds per frame. Enter a target to see the budget and split it between your systems.

Enter your base resolution, such as 320 by 180, and see the clean integer scales for common screens and how much space is left over.

Choose a curve, set the base cost and see the XP to each level, the running total and how many hours it takes to reach the last level at your expected XP rate.

Set a seed, shape the noise and download a greyscale heightmap for Unity, Godot, Unreal or Blender. The colour preview shows sea level, beaches, grass, rock and snow.

Drop in a photo, a render or a concept sketch and get a pixelated version at the size you choose. Use it for texture references, prototypes and PSX-style textures.

The essentials to check in the weeks before you ship. Tick them off as you go: progress is saved in this browser. For the full 123-point version from first idea to the month after launch, see Preflight.

Enter your wishlists, price and launch discount. The estimator shows first-week copies and what reaches you after tax and Steam's cut, at your ratio and at four others.

Enter a weapon's stats and an enemy's health and armour to see average damage per second and how long a kill takes.

Music and voice are often the biggest part of a build. Enter length and format to estimate the size before you hit your platform's limit.

A long design document is rarely read. A one-pager forces you to decide. Fill in the fields, copy the Markdown and keep it where your team can see it.

A small, fast pixel editor for icons, items and sprites. Draw, mirror, fill and export a transparent PNG. For palettes that look good together, pair it with the palette generator.

Pick a preset or roll a random sound, tweak the pitch, slide and fade, and download a WAV for your prototype. Nothing is uploaded; the sound is generated in your browser.

Pick base hues and the generator builds hue-shifted ramps (shadows lean cool, highlights lean warm) and snaps every colour to the PS1's 15-bit colour depth. Click a swatch to copy its hex code.

Texel density is how many texture pixels cover one metre of your model. Keep it consistent and objects look like they belong in the same world. Measure an object on the left and size a new texture on the right.

Set how many triangles you want on screen per frame, then split them between environment, props, characters and the first-person weapon. The calculator gives a triangle budget per object.

Upload a sprite sheet, tell it how many columns and rows it has and watch the animation play. It shows the frame size so you can match your engine's slice settings.

Upload a screenshot, a photo or a painting and get the colours that define it. Click a swatch to copy its hex code.

Pick a base hue and a colour harmony. You get hue-shifted ramps from dark to light for each colour, ready to export for your engine or pixel art editor.

A texture that looks fine alone can show ugly seams when repeated. Upload it, tile it and shift by half to find the problem.

Pick an easing curve and watch a ball move with it. Use the table of values to match the curve to your engine's tween or animation curve.

Paste a colour, copy it in the format your engine wants, and check whether your HUD or menu text is readable on its background.

Keep your game on track with a board that lives in your browser. Add tasks, tag them, drag them across columns and export a backup. No account, nothing uploaded.

Enter your price and expected sales to see what you receive per copy and in total on Steam and itch.io, before income tax.

Choose a genre and type your budget. You get the packs and systems that build that kind of game, in the order that gets you to a playable level fastest, and the ones that fit your budget today.

Stuck on what to make? Roll six slots (genre, mechanic, setting, look, twist, constraint), lock the ones you like, reroll the rest and copy a pitch you can prototype this weekend. Pick how much time you have for a scope hint, and see assets that fit the genre.

Drop in an image, choose a game-friendly size and download a PNG. It tells you when your original is not a power of two and keeps pixel art sharp with nearest-neighbour scaling.

Pick a preset or move the sliders and watch the bulb. When it feels right, copy the script for Unity or Godot and attach it to a light.

Drop in a screenshot, or use the sample, and push the sliders until it feels uneasy. The values below the image help you set fog, ambient light and post-processing in your engine.

Move the sliders to build a quiet, uneasy bed of sound, listen to the loop and download it as a WAV. It is a fast way to get placeholder or final ambience for a prototype.