Mountain Background Generator
Make a mountain background: misty blue ranges, snowy peaks on a clear day, pink peaks at dawn, golden-hour ridges, purple dusk layers, a starry night over the mountains or a still alpine lake that mirrors them. Pick a preset or set your own: how many ranges, how tall the peaks are, how much snow, how much the far ranges fade into the haze, the valley mist, pines on the nearest slope, the lake, the time of day, the clouds, the sun, the moon and the stars. Every picture comes from a seed number: the same seed and size always give the same mountains, and New seed gives you a new skyline. Choose desktop, 4K, phone, a 16:9 video-call background (for Zoom, Teams or Meet), tablet, square, banner or your own size up to 4096 pixels. It is artwork drawn by our code, not a photograph. Download a PNG or JPG, or a PDF to print. Nothing is uploaded.
100% private — everything runs in your browser. Everything runs in your browser; nothing is uploaded.
The preview is the same picture drawn smaller. PNG and JPG download at the full size; the PDF fits the picture on one page.
Picture
Mountains
Sky
Runs in your browser with our own code: nothing you type is uploaded or saved. Every ridge, cloud, star and pine is drawn by our own code from the seed; it is artwork, not a photograph. You may use what you make here, including commercially, with no credit needed.
How to make a mountain background
- Pick a preset: alpine peaks, misty ranges, dawn, golden hour, dusk, starry night, alpine lake and more.
- Set how many ranges and how tall the peaks are; press New seed for a new skyline.
- Add snow, haze and valley mist.
- Add pines and an alpine lake that mirrors the mountains.
- Choose the time of day, the clouds, the sun, the moon and the stars.
- Choose a size and download the PNG or JPG, or the print PDF.
What you can use it for
- Desktop and phone wallpapers
- Video-call backgrounds
- Slides, book covers and posters
- Outdoor, travel and hiking social posts
- Website heroes and newsletter headers
- Game and video backdrops
The 14 presets
| Preset | Time of day | Ranges | What is in it | Size |
|---|---|---|---|---|
| Alpine peaks on a clear day | Clear day | 5 | snow 55 %, 30 pines | 1920 × 1080 |
| Misty blue ranges | Clear day | 7 | – | 1920 × 1080 |
| Pink dawn peaks | Dawn | 5 | snow 50 % | 1920 × 1080 |
| Golden hour ranges | Golden hour | 6 | snow 25 %, 20 pines | 1920 × 1080 |
| Purple dusk layers | Sunset and dusk | 6 | – | 1920 × 1080 |
| Starry night peaks | Night | 4 | snow 50 %, 900 stars, moon | 1920 × 1080 |
| Alpine lake reflection | Clear day | 4 | snow 60 %, 40 pines, lake | 1920 × 1080 |
| Still lake at dawn | Dawn | 5 | snow 40 %, 25 pines, lake | 1920 × 1080 |
| High snowy peaks | Clear day | 4 | snow 90 % | 1920 × 1080 |
| Moonlit lake | Night | 4 | snow 50 %, 30 pines, lake, 600 stars, moon | 1920 × 1080 |
| Blue hour ridges | Blue hour | 7 | 60 stars | 1920 × 1080 |
| Video call: calm misty ranges | Misty overcast | 6 | snow 20 % | 1920 × 1080 |
| Phone wallpaper: dusk peaks | Sunset and dusk | 5 | snow 40 % | 1170 × 2532 |
| 4K golden alpine lake | Golden hour | 5 | snow 45 %, 35 pines, lake | 3840 × 2160 |
Worked out by the tool.
Sizes
| Size | Pixels | Width ÷ height |
|---|---|---|
| Phone | 1170 × 2532 | 0.462 |
| Desktop | 1920 × 1080 | 1.778 |
| 4K | 3840 × 2160 | 1.778 |
| Video call background | 1920 × 1080 | 1.778 |
| Tablet | 2048 × 2732 | 0.750 |
| Square | 2048 × 2048 | 1.000 |
| Banner | 1500 × 500 | 3.000 |
Every size is drawn at its own pixels, not stretched.
How the far ranges fade
| Range | Mixed towards the haze | Colour | Brightness (0–255) | Baseline (from the top) | Peak height |
|---|---|---|---|---|---|
| 1 (farthest) | 85 % | #a1b6c7 | 179 | 540 px | 324 px |
| 2 | 61 % | #7d929c | 142 | 673 px | 286 px |
| 3 | 38 % | #5b7072 | 108 | 780 px | 248 px |
| 4 | 17 % | #3c504c | 75 | 878 px | 211 px |
| 5 (nearest) | 0 % | #22362d | 49 | 972 px | 173 px |
Worked out by the tool for the Alpine peaks preset (5 ranges, desktop): the farther the range, the more haze, the lighter the colour and the taller the peaks. Each range’s haze share is the haze setting × (1 − its place from the back ÷ (ranges − 1))^1.15.
The 7 times of day
| Time of day | Haze colour | Nearest range | Far ranges look |
|---|---|---|---|
| Clear day | #b7cde2 | #22362d | lighter and bluer |
| Dawn | #d8b2c3 | #2a2440 | lighter, towards a warm haze |
| Golden hour | #e6c39c | #382b29 | lighter, towards a warm haze |
| Sunset and dusk | #a98ab6 | #1b152f | lighter, towards a warm haze |
| Blue hour | #7d8ec0 | #111932 | lighter and bluer |
| Night | #2e3d6a | #060a16 | lighter and bluer |
| Misty overcast | #c0c8d2 | #394047 | lighter and bluer |
The sky for each time of day comes from the same painted-sky code as our sky backgrounds.
What downloads
| Download | What is in it |
|---|---|
| PNG | The still picture at the full size you chose, every pixel exactly as drawn |
| JPG | The same picture as a smaller JPG (quality 92) |
| One Letter or A4 page with the picture fitted inside 10 mm margins |
| Paper | A 4K picture prints at | Sharpness |
|---|---|---|
| Letter (landscape) | 259.4 × 145.9 mm | 376 px per inch |
| A4 (landscape) | 277.0 × 155.8 mm | 352 px per inch |
To fit a photo of your own to a screen, use the Phone Wallpaper Maker; to change the size of a picture afterwards, the Image Resizer.
Which tool to use
| You want | Use |
|---|---|
| Layered mountain ranges, snowy peaks or an alpine lake | Mountain Background Generator (this page) |
| A painted sky with clouds and no mountains | Sky Background |
| Falling snow over a winter scene | Snow Background |
| Contour lines of made-up terrain | Topographic Map Generator |
| The real stars for a date and place | Star Map |
Other tools: the Topographic Map Generator for contour-line art, and the Star Map for the night sky of a real date.
More free tools
More landscapes and skies?
Picture and print tools that run privately in your browser, with no sign-up and no watermark.
Frequently asked questions
Is this a photo?
No. Every ridge, cloud, star and pine is drawn by our own code from the seed: it is artwork, not a photograph.
Why are the far ranges lighter?
Each range is mixed towards the haze colour of the time of day, more the farther away it is, and its light and shade get weaker too. Painters call this aerial (or atmospheric) perspective. The table below gives the numbers for the first preset.
How are the peaks made?
Each ridge line comes from ridged random noise, which gives sharp peaks and soft valleys. The ranges at the back are taller with finer teeth, and each range’s highest point is exactly its stated peak height.
How does the lake reflection work?
Everything above the shore is mirrored into the water, then tinted with the lake colour, a little more towards the bottom, and shifted by small ripples.
How is this different from the snow and geometric backgrounds?
Those have a winter mountain scene or flat angular peaks as one choice among many. This page is only mountains: several ranges, snowcaps, mist, pines and lakes, with the haze worked out per range.
Can I use it as a video-call background?
Yes. Choose Video call background (16:9, 1920 × 1080), download the PNG or JPG and pick it as a virtual background in your video-call app. The calm misty ranges preset keeps it quiet.
What does the seed do?
It fixes the shape of every ridge, cloud, star and pine. The same seed and size give exactly the same picture, pixel for pixel.
How big does the PDF print?
The picture is fitted on one Letter or A4 page inside 10 mm margins, turned to suit its shape. The table below gives the printed size of a 4K picture.
Is it free?
Yes. There is no sign-up, no watermark and no limit.
Is anything uploaded?
No. Every pixel is worked out by JavaScript in your browser. Nothing you type is sent anywhere or saved when you close the page.