Lumen Photo Lab
LUMEN

Grade light
like film.

A colour lab that runs on your graphics card. Load a photo, shape its light, pick a film look, and export it at full resolution.

Open the lab
The lab

Your photo, live

sample — dusk over the lake.png
BEFORE AFTER
Size — Crop — Engine — Frame —
This session Photos loaded 1Looks applied 0Exports 0 Free plan

Light

Colour

Film look

Texture

Histogram —

RedGreenBlueLuminance

Palette

Export

Batch Pro

Apply the current grade to several photos at once and export each one.

What it does

A darkroom in a tab

Tone

Shape the light

Exposure in stops, contrast, and separate pulls for highlights and shadows, all previewed as you drag.

±3 EV · highlights · shadows · contrast
Colour

Set the mood

Warm or cool the white balance, shift tint, and push colour with saturation or the gentler vibrance.

temperature · tint · saturation · vibrance
Looks

Eight film looks

Each look is a colour matrix, a split tone and a tone curve, layered on top of your own edits. Save your own settings as looks too.

Neutral · Golden Hour · Coastline · Silver · Tungsten Night · Faded Print · Cross Process · Matte Teal
Detail

Sharpen and grain

An unsharp mask brings back edge detail, and fine grain and a vignette finish the frame.

unsharp mask · grain · vignette
Read

See the numbers

A live histogram shows each channel and warns when highlights or shadows clip. The palette pulls the six main colours.

RGB + luminance · clipping · 6-colour palette
Output

Export and batch

Crop to a common ratio and export a PNG graded exactly as the preview, or grade a whole set of photos in one go.

original · 1:1 · 4:5 · 3:2 · 16:9 · PNG · batch
How it works

Three passes

Decode

Read on your device

Your browser opens the file. Large photos are fitted to the largest size your graphics card can hold.

Grade

Process on the graphics card

One shader applies every adjustment to every pixel at once, so changes appear while you drag.

Export

Render at full size

The final grade is drawn again at full resolution and saved as a lossless PNG.

Privacy

Your photos stay with you

Lumen has no upload step. Photos are opened, graded and exported inside this page, and nothing is sent to a server. Close the tab and they're gone.

Photo openedin your browser
Adjustmentsyour graphics card
Exportin your browser
Uploaded to a servernever
Pricing

Pick a plan

Free

$0forever
  • Every adjustment, histogram, palette and crop
  • 5 film looks
  • Save 1 look of your own
  • Export up to 2048 px on the long edge
  • No watermark
Open the lab

Pro Most chosen

$9per month
  • Everything in Free
  • Full-resolution export
  • All 8 film looks
  • Save up to 20 looks
  • Batch-apply a grade to many photos

Studio

$24per month
  • Everything in Pro
  • 3 seats
  • Unlimited saved looks
  • Shared look library for the team
  • Priority support by email

Trials need no card. Billing opens with the full launch.

Team

Founded by Charles

Contact us
Founder

Charles

Builds Lumen at Lumen Photo App: a colour lab that grades photos on your own graphics card, so they never leave your device.

charles@lumenphotoapp.comStudio
Open role

Colour scientist

Help design film looks and tone curves that hold up on any photo.

Open role

Front-end engineer

Work on the graphics pipeline and the lab's controls in the browser.