ShareX vs SnapLocal:
Power-user tool or privacy-first alternative?

Take a screenshot on Windows and you have two very different tools waiting for you. ShareX is open source, endlessly configurable, capable of capturing video, scrolling windows, GIFs, running OCR, and piping images through a dozen after-capture workflows. SnapLocal is a browser extension that does one thing and refuses to do anything that involves a network request. This article compares the two honestly, including where each one is the better choice — because for a lot of people, the answer is “keep ShareX.”

Two philosophies of “local”

ShareX is a desktop application with full operating-system reach. It can capture anything visible on your screen, record video, automate workflows, and run shell commands on the result. That power comes with an equally broad attack surface: by default, ShareX ships with upload destinations configured (Imgur, S3, FTP, custom HTTP endpoints), and its “after capture” tasks can quietly push your image to a third-party server the moment you release the mouse. You can disable this. Many users don't realize they should.

SnapLocal is a browser extension that runs inside Chrome's permission model. Its manifest declares zero host_permissions. Chrome itself would block any attempt to make a network request from the extension — not because we promised not to, but because the browser wouldn't let us. Captures are written to chrome.storage.local on your device. The trade-off is scope: SnapLocal lives inside the browser, so it captures what your browser can see — which, for most knowledge workers, is most of what they screenshot anyway.

ShareX gives you a control panel and expects you to manage it. SnapLocal gives you a hotkey and a permission model that manages itself.

Where ShareX wins (honestly)

If your workflow needs any of the following, ShareX is the better tool:

• Video and GIF capture. SnapLocal is still images only.
• Scrolling capture across native apps. SnapLocal's full-page capture is limited to browser tabs.
• System-wide OCR. ShareX integrates with Tesseract locally.
• Custom post-capture pipelines. Shell commands, watermarking, renaming by pattern. SnapLocal's pipeline is capture → annotate → export.
• Cross-application hotkeys. ShareX works anywhere on the desktop; SnapLocal's hotkeys fire when Chrome has focus.

ShareX is free, open-source (GPLv3), and excellent at what it does. If you've already tuned it, this article isn't trying to convince you to switch.

Where SnapLocal wins

• Zero upload by architecture. Not by policy or configuration — by permission model. There is no code path that could send a capture to a server.
• Zero configuration. Install, press Alt+Shift+S, draw a box. No dialogs, no “after capture tasks,” no upload destinations to disable.
• Free mosaic redaction. Pixel-destructive and unlimited in the free tier. ShareX's redaction is a multi-step detour through the effects panel.
• Browser-native history. A local, scrollable history inside the extension. ShareX keeps history as file-system entries you manage yourself.
• No install friction on managed machines. No admin rights, no tray icon, no background services.

Side by side

The upload question

Screenshots are rarely planned. The same hotkey you use for a bug report also captures password reset emails, internal dashboards, private messages, financial balances — anything behind the selection rectangle.

With ShareX, whether those captures leave your machine depends on the “after capture” workflow — a setting buried under Advanced Settings that many users never open. With SnapLocal, the question doesn't arise: Chrome would refuse the request before it left the process. If you've ever used ShareX with its default upload destination active, your captures are on someone else's server right now.

For the broader category, see our roundup of the best private screenshot tools for Chrome in 2026, or the Lightshot vs SnapLocal comparison for the browser-extension side of the same question.

Learning curve and daily friction

ShareX is a control panel with more tabs than most IDEs. For a power user, that's the point. For everyone else, the first ten minutes involve dismissing dialogs and wondering why the “after capture tasks” popup keeps appearing.

SnapLocal is one hotkey. Install from the Chrome Web Store, press Alt+Shift+S, drag a rectangle, annotate, save. There is no configuration surface because there is nothing to configure. Our tutorial on how to screenshot and annotate on Windows without uploading anything walks through the whole workflow.

Verdict: who should use what

Keep ShareX if: you record screen video, capture native desktop apps, run OCR workflows, or have already invested hours tuning your after-capture pipeline.

Choose SnapLocal if: your screenshots are mostly browser content, you want zero-config capture with a real mosaic redactor, you'd rather not think about whether your tool is uploading, or you're on a managed machine where installing desktop software is friction. SnapLocal is the ShareX alternative for people who want the convenience without the configuration — and without the upload path.

Use both if: you have a video capture workflow for demos and a browser capture workflow for everything else. They don't conflict.