100% Client-SideNo AI API CallsFree

$0.75

Daily Cost

$22.50

Monthly Cost (30 days)

Prices: GPT-4o = $2.5/1M input, $10/1M output tokens
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100 calls/day, no card, no spam. Built by one person, in public.

About API Cost

API Cost was built for the moment you just need to handle this task and move on — no signup, no upload to a third-party server. Built to be the kind of tool you bookmark and use weekly: no surprises between visits, no degraded free tier, and a UI that gets out of the way. Like everything else in the utility collection, it is free, ad-light, and works on mobile as well as desktop.

When you'd reach for API Cost

  • You're hitting the daily limit of a paid SaaS and need a backup option for a single quick job.

    Marketers and ops people whose primary tool is metered.

    Stay productive without burning credits.

  • You need to handle a one-off task right before a meeting and don't have time to install anything.

    Anyone working remotely on a borrowed or restricted machine.

    Open the page, get the result, paste it into your doc — under a minute.

  • You're cleaning up a folder of files that accumulated over a project and need to standardize them.

    Designers, writers, and developers wrapping up deliverables.

    Drop each file in, copy the output, move on.

  • You're on a public or shared machine and don't want to leave traces of what you're working on.

    Travelers, contractors, anyone working from a friend's computer.

    Nothing is uploaded, nothing persists if you're not signed in.

Frequently asked about API Cost

What browsers does API Cost support?
Every modern browser released in the last three years: Chrome, Firefox, Safari, Edge, Brave, Opera.
Can I use API Cost commercially?
Yes. The output of API Cost belongs entirely to you, with no licensing restrictions.
Does API Cost work on mobile?
Yes, API Cost is fully responsive and tested on iOS Safari and Android Chrome.
Will API Cost change my original file?
Never. API Cost only reads your input file and produces a new output file.
Is API Cost really free?
Yes — API Cost is free for unlimited personal use, with no account required and no watermark on the output.