FireImg's answer

It's this simple

Original: https://img.fireimg.com/raw-images/demo/mountain.jpg

Resize to 300px: https://img.fireimg.com/demo/images/mountain.jpg?width=300

Resize to 800px: https://img.fireimg.com/demo/images/mountain.jpg?width=800

Resize with query params: https://img.fireimg.com/demo/images/mountain.jpg?width=800

Same image. Different sizes. Just change the URL.

RepDB's answer:

RepDB is sold as a one-time download, not a metered API — you own the JSON/SQLite data and WebP images outright, with no rate limits, no per-request billing, and no risk of the vendor cutting off access. It's also the only dataset in this space with EN/DE/ES translations, transparent (alpha-channel) images with no watermark, muscle-group highlighting, safety/goal tags, and looping animations on the higher tier.

FireImg's answer

No CC needed until you exceed the free tier

Simple resizing

Works well with any framework, or no framework at all!

RepDB's answer:

Most alternatives are subscription APIs — you pay monthly, you're capped on requests, and ExerciseDB's terms of use explicitly forbid caching or storing the data at all, so every image render is a live paid API call. RepDB is the opposite: pay once, download the files, self-host with zero ongoing dependency. It's also the only option offering true DE/ES localization and transparent images instead of a white box behind every exercise.

FireImg's answer

We built FireImg after repeatedly running into how complex image optimization can be. Most solutions require setting up pipelines, learning new APIs, and dealing with unpredictable pricing.

For many projects, that felt like overkill. Hand-rolling something always distracted from what actually mattered.

So we built FireImg to be as simple as possible. Upload an image and transform it directly via URL. No setup, no SDK, no managing image libraries. Upload once, then generate and serve thousands of variations by changing the URL, with built-in caching so each transformation happens only once.

As we built it, we kept pushing toward simplicity and removing anything unnecessary. The goal was to make something you can try instantly and understand in seconds.

RepDB's answer:

RepDB grew out of a consumer workout app its creator was building solo. Sourcing exercise images and data meant either paying for a subscription API with usage caps and no caching rights, or producing everything from scratch. The illustrated, multi-language dataset was built for us first, then split out as its own product once it became clear other indie developers had the same problem and preferred to buy the data outright rather than rent it through an API.

RepDB's answer:

Solo developers and small teams building fitness or workout-tracking apps (iOS, Android, web) who need licensed exercise images and structured exercise data, but don't want to build their own media pipeline or depend on a rate-limited third-party API.