SnapCustom was born out of a simple frustration: mainstream browser tools have traded speed and user privacy for corporate analytics, forced registration walls, and heavy data leaks.
For years, designers and engineers relied on simple browser screenshot extensions to share rapid mockups or log QA tickets. However, over time, these extensions underwent a massive corporatization phase. They began inserting intrusive trackers, displaying banner advertisements, mandating cloud logins, and, worst of all, uploading local screenshots to remote file servers without explicit consent.
Furthermore, we noticed a major absence of technical controls. Developers couldn't select modern image codecs like WEBP lossless quality scales, nor could they input manual dimensions in pixels to override the mouse dragging limits. The tools had become bloated yet technically constrained.
Our answer is SnapCustom: a fully sandboxed, local-first capture extension. Everything runs within your active browser tab, completely isolated from outside networks. There is no telemetry, no account login required, and absolutely 0 bytes uploaded to external platforms.
We believe software should be lightweight, open, transparent, and do exactly one utility task exceptionally well. That is why the entire extension codebase remains open source on GitHub for anyone to audit, fork, or improve.
Four cornerstone principles behind every line of code we write.
Processing happens in memory locally. There is no waiting for uploads or remote rendering scripts, allowing instantaneous crops.
The entire production package weighs less than 100KB, utilizing clean, raw native Web APIs rather than bloated framework stacks.
Zero hidden routines. Access full manifest files, background scripts, and extension permissions freely via the GitHub repository.
Supports high-DPI scaling downsampling and compression overrides, producing authentic captures without lossy codec leakages.