Heat Island Effect
Get a free API key + new tools as they ship
100 calls/day, no card, no spam. Built by one person, in public.
About Heat Island
Working with this task no longer requires installing heavy desktop software — Heat Island runs entirely in your browser, instantly. The goal was to keep the path from "open the page" to "get the result" as short as possible. No mandatory account, no cookie wall, no upsell at every step. If you find yourself doing this regularly, the rest of the utility suite covers most adjacent tasks with the same approach.
When you'd reach for Heat Island
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 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 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'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 Heat Island
- What browsers does Heat Island support?
- Every modern browser released in the last three years: Chrome, Firefox, Safari, Edge, Brave, Opera.
- Will Heat Island change my original file?
- Never. Heat Island only reads your input file and produces a new output file.
- Are my files uploaded to a server when I use Heat Island?
- Heat Island processes everything in your browser using local APIs. Your files never leave your device.
- Is Heat Island really free?
- Yes — Heat Island is free for unlimited personal use, with no account required and no watermark on the output.
- Can I use Heat Island commercially?
- Yes. The output of Heat Island belongs entirely to you, with no licensing restrictions.
