You don’t have to be a tech genius to use your computer.

Taking back control of your computer is as easy as 1, 2, 3!

  • Shrink, combine, and split PDFs—all on your computer
  • Convert, trim, and edit audio and video files
  • Download media from links with a clear review before anything runs

…and much more.

Explore all the features

Download for Mac

Other downloads: for Windows and Linux.

Download for Windows

Other downloads: for Mac and Linux.

Download for Linux

Other downloads: for Mac and Windows.

Download for Mac Download for Windows Download for Linux

30-day full-feature trial. Your files stay on your computer. See pricing

Everything you need for everyday file work

Every tool follows the same calm sequence: pick inputs, choose the outcome, review before running.

Documents

  • Make PDFs smaller
  • Combine files into one PDF
  • Split pages into separate files
  • Add or remove password protection

Audio and video

  • Convert audio or video files
  • Trim clips
  • Combine clips
  • Adjust quality or file size

Media links

Save media from links, choose where it should go, and review the job before any files are written.

System Coming soon

Clean up apps, tidy leftover files, and keep your computer running smoothly—without digging through settings panels.

How it works

Every tool uses the same three-step pattern, so you always know what will happen before files are changed.

1. Pick inputs—add files, folders, or links.
2. Choose the outcome you want.
3. Review the summary, then run.

Local by default

Diametheus is a desktop app. Your files stay on your computer while trusted helper tools do the heavy work behind a clean interface.

Built for repeated chores

Useful for creators, consultants, office teams, and technical users who want reliable batch workflows without keeping command snippets around.

Download Diametheus

Start your 30-day full-feature trial. Need a license now? See pricing.

Read release notes for what changed in recent builds.

Download for Mac

Size: 6 MB

Other downloads: for Windows (6 MB) and Linux (7 MB).

Download for Linux

Size: 7 MB

Other downloads: for Mac (6 MB) and Windows (6 MB).

Download for Windows

Size: 6 MB

Other downloads: for Mac (6 MB) and Linux (7 MB).

Download for Mac

Size: 6 MB

Download for Linux

Size: 7 MB

Download for Windows

Size: 6 MB

App version 1.1.7 · Built July 12, 2026 at 12:50

Pricing

Paid licenses

Download and try every feature free for 30 days. A paid license keeps you running after the trial and works across supported desktop platforms.

Essential

Straightforward license for one named person

Early supporter price

Early supporter $40 USD
Regular $50

Regular price shown for context

  • Perpetual license—you pay once and keep using what you bought
  • Full app—every guided workflow and feature
  • Use on multiple computers as the same person
  • Includes updates for one year after purchase

After purchase, your license key is emailed to you and shown in the members area.

Pro

For people who want updates for the long haul

Early supporter price

Early supporter $160 USD
Regular $200

Regular price shown for context

  • Perpetual license—you pay once and keep using what you bought
  • Full app—every guided workflow and feature
  • Use on multiple computers as the same person
  • Updates included for as long as active development continues
  • Planned at launch: priority help channel and early-access builds when offered

After purchase, your license key is emailed to you and shown in the members area.

Team

Up to ten employees, reassigned within your organization

Early supporter price

Early supporter $800 USD
Regular $1,000

Regular price shown for context · up to 10 seats

  • Perpetual license—you pay once and keep using what you bought
  • Full app—every guided workflow and feature
  • Each seat covers one employee's installs across their devices
  • Includes updates for one year after purchase

After purchase, your license key is emailed to you and shown in the members area.

Team Pro

Team-sized pool with long-term updates

Early supporter price

Early supporter $4,000 USD
Regular $5,000

Regular price shown for context · up to 10 seats

  • Perpetual license—you pay once and keep using what you bought
  • Full app—every guided workflow and feature
  • Up to ten employees, reassigned within your organization
  • Updates included for as long as active development continues
  • Planned at launch: priority help channel and early-access builds when offered

After purchase, your license key is emailed to you and shown in the members area.

All prices are one-time perpetual licenses. Start with a 30-day trial, then activate when you are ready.

Need something custom? Contact us and describe your team.

Read our privacy notes for how we handle your data.

Regular list prices are $50 (Essential), $200 (Pro), $1,000 (Team), and $5,000 (Team Pro) USD, all applicable taxes included. The larger price with strikethrough is the planned regular price; the bold price is the planned early supporter price.

Frequently asked questions

Need help? Contact us or check the support notes.

No. Diametheus runs on your computer and processes the files and folders you choose locally.

Some workflows need trusted helper tools. Diametheus downloads the required helpers during setup so the installer can stay smaller and updates can stay manageable.

No. Diametheus is focused on guided, reviewable file workflows.

Download Diametheus and use every feature free for 30 days. When the trial ends, activate a license to keep running jobs.

You can purchase a license at any time during or after the trial. Once activated, you keep using the app with no interruption to your workflows.

You keep using the app after purchase. Essential and Team include updates for one year after purchase. Pro and Team Pro include ongoing updates while development continues. You can always keep the last version you received.

Yes. Essential and Pro are for a named person and stay with that person. For seats you can pass between employees, choose Team or Team Pro.

Yes. Individual licenses cover one person across their machines, including different platforms once builds exist for them. Team licenses apply per employee the same way.

Both include the full app forever. Essential and Team include updates for one year after purchase. Pro and Team Pro include ongoing updates while the product is actively developed, plus planned priority support and early-access builds when offered.

Checkout is handled securely by Stripe. After purchase, your Diametheus license key is emailed to you and available in the members area.