What's the difference between Personal and Studio?

Personal ($39) is for one person — unlimited use on one active device at a time. Activate on a new device and the old one signs out. Studio ($199) is for teams and commercial client work — unlimited team members, early access to new tools, and a commercial license.

Do I need an account?

No. Use any tool free up to 5 times per day on compute-heavier tools, and unlimited on lightweight ones. No card, no account, no signup required.

Where are my files processed?

Right on your device. Files never upload to any server. Everything runs in your browser — you can verify in DevTools → Network.

What happens if I use my Personal license on a second device?

The new device activates and the old device signs out. Your license key stays the same — you just move it between devices as needed. No limit on how often you switch.

Does this work on my phone?

Yes. Every tool works on iPhone, Android, tablet, and desktop.

What if I want a refund?

30-day money-back guarantee on both tiers. No questions asked. Email sales@cipherforces.com.

Will you add more tools?

Yes. New tools ship regularly. Your license includes every tool we ever release — Studio members get early access.

ImageBy Daniel BeglaryanUpdated August 2026

Duotone an Image

Turn any photo into a two-color duotone using shadow and highlight colors.

PrivateWorks OfflineNo Account

Presets

Shadow colorDarkest areas

Highlight colorBrightest areas

Contrast

Linear tone map

Drop an image to duotone

paste works too — Ctrl+V / ⌘V

JPEGPNGWebPHEICAVIFGIF

Max 50MB

Deep dive

About Duotone an Image.

Turn Any Photo Into a Two-Color Duotone

A duotone maps every pixel of an image to a blend of just two colors based on its brightness — dark areas take your shadow color, bright areas take your highlight color, and everything in between is interpolated. Drop in a photo, pick the two colors, and this tool rebuilds it live on a canvas so you can dial the look in real time.

Everything runs in your browser. Your image is never uploaded, there is no account or watermark, and you can preview and re-color as many times as you like before you download. Start from a preset like Midnight, Sepia, or Cyanotype, or type exact hex values for a brand-matched pair, then push the contrast slider from a soft, flat wash to a punchy near-threshold graphic.

One honest note: this is a global brightness-to-color map, not a per-region edit — it recolors the whole image at once. Exports are saved as PNG, and very large images are capped (4096px on the long edge, 2048px on phones) to stay within browser memory.

Common Use Cases

Brand imagery: Recolor stock or team photos into your exact brand colors for a consistent site, deck, or social feed.
Music-cover look: Recreate the bold two-tone portrait style used for playlist, podcast, and album artwork.
Poster backgrounds: Flatten a busy photo into a single-mood backdrop that headline text sits cleanly on top of.
Unified galleries: Apply the same shadow/highlight pair across many images so they read as one series.
Two-ink print previews: See how a photo reads when reduced to a shadow ink and a highlight ink before sending art to press.
Section hero art: Drop the contrast for a subtle duotone tint, or raise it for a high-impact graphic edge.

Privacy: This tool runs entirely in your browser. Your image is decoded, recolored, and exported on your own device — nothing is ever uploaded to a server.

Three steps