Are my images uploaded to a server?

No. Everything runs in your browser, so the image never leaves your device and nothing is stored on a server.

Sepia

Give an image a warm, vintage sepia tone.

Runs in your browser, nothing is uploadedFree, no signupNo watermark

Drop an image here

or click to choose one. It never leaves your device.

Before and after

See what changes

Six Thridy 3D food icons arranged on a warm gradient background — Near full strength, which reads as a deliberate period effect. Most of the time the useful setting is a quarter of this.

Near full strength, which reads as a deliberate period effect. Most of the time the useful setting is a quarter of this.

Drag the handle across the image. The right-hand side is this tool's output, not a mock-up of it.

Before: Original
After: Sepia

Three steps

How to use the sepia

01
Drop in a photo
Add the image you want to age.
02
Set the strength
A light touch reads as warmth, a full application reads as an old photograph.
03
Download the toned image
The tone is applied to the pixels rather than as an overlay.

Why this one

What makes it different

Strength you control

Sepia at full strength is a costume. At twenty percent it is just a warm cast, and that is the setting people actually want more often.

Tonal detail is preserved

The brightness relationships stay intact underneath the tone, so the image does not go flat the way a colour overlay makes it.

One pass, no stacking

A single tone applied cleanly rather than desaturate-then-tint, which is where the muddy version of this effect comes from.

Where it runs: Your browser, not a server
Uploads: None, ever
Account: Not required
Watermark: Never added

The short version

About sepia

Sepia is a real photographic process before it was a filter: toning a silver print to make it last longer, which is why surviving nineteenth century photographs are brown. That history is why it signals age so reliably, and also why it looks like a costume at full strength. Most of its modern usefulness lives in the first quarter of the slider.

Questions

Sepia FAQ

What is sepia, actually?

A warm brown monochrome. It comes from a real photographic process that converted silver in a print to a more stable compound, which is also why genuinely old photographs are brown rather than grey.

How strong should sepia be?

For a nostalgic hint, fifteen to thirty percent. Full strength reads as a deliberate period effect, which is fine when that is the intent and heavy-handed when it is not.

Is sepia the same as a warm filter?

No. A warm filter keeps the colours and shifts them warmer. Sepia removes the colour entirely and replaces it with a single brown tone.

Can I undo sepia later?

Not from the saved file. Like any tone, it replaces the original colour information, so keep the original if you might want it.

Free, and staying free

The tools are free because the icons are the business.

Thridy is a library of thousands of 3D icons in one consistent style, free for commercial use with no attribution and no account. The tools exist so you never have to upload an image to somebody else's server to resize it.

Browse the icons Request an icon

Keep going

Blur Image

Apply a smooth Gaussian blur by any amount.

Pixelate Image

Pixelate an image or hide part of it in blocks.

Sharpen Image

Bring out edges and detail with a sharpen pass.

Brightness

Brighten or darken an image.

Contrast

Increase or soften the contrast of an image.

Saturation

Make colours richer or more muted.

All tools