CapsuleKit

Small, fast tools that run entirely in your browser. Free, no sign-up, nothing uploaded.

Steam Capsule Resizer

One key art → every Steam store and library asset size, with per-size cropping and a one-click ZIP.

Steam Trailer Preflight

Check a trailer's resolution, frame rate, codec, bitrate and audio against Valve's requirements before uploading.

LLM API Cost Calculator

Compare monthly API costs across Claude, GPT, Gemini and DeepSeek, with caching and batch discounts.