August 10, 2026
Ctrl+Alt+Distrust
Show HN: MergeImage – merge and stitch images locally in the browser
Private photo-merging tool lands on Hacker News — and instantly gets hit with trust issues
TLDR: MergeImage lets people combine photos and screenshots directly in their browser so private files don’t need to be uploaded. But the biggest reaction wasn’t excitement — it was suspicion, with commenters immediately questioning whether a privacy-focused tool should be closed-source.
A new Hacker News showcase post is pitching a very practical promise: toss up to 30 pictures into your browser, rearrange them, stitch them side by side or top to bottom, even clean up overlapping screenshots — all without sending your images to some company server. For anyone who has ever tried to combine receipts, study notes, family photos, or endless phone screenshots, that’s the kind of boring-but-useful tool that should quietly win people over.
But this is Hacker News, so of course the first splash of drama wasn’t about image layouts. It was about trust. The standout reaction came fast and sharp: the project "appears to be vibe-coded and closed-source," which is basically the internet equivalent of squinting at a homemade gadget and saying, “Cute, but are we sure this thing is safe?” That one line instantly reframed the whole story. The app says privacy is the point because everything happens on your device, but critics clearly want receipts of their own — especially when the product’s whole selling point is, “Trust us, your files stay local.”
So the mood around MergeImage is less "wow, neat" and more "prove it". The humor is dry, the skepticism is loud, and the community seems to be treating the tool like a stranger offering to hold their family photo album. Useful idea? Absolutely. But in the comments, the real merge happening is between curiosity and suspicion.
Key Points
- •The article presents MergeImage as a browser-based tool for combining separate images into a single canvas using horizontal, vertical, grid, or smart-stitch layouts.
- •Users can reorder uploaded files, remove them from the queue, and generate previews on demand before exporting.
- •The tool supports up to 30 PNG, JPEG, or WebP files and can export merged output in PNG, JPEG, or WebP.
- •The article says processing is done locally in the browser, without uploading originals to a remote service or requiring an account.
- •Product limits include 20 MB per input file and automatic output reduction beyond a 12,000-pixel edge or 80 megapixels; smart overlap trimming is used conservatively for consecutive screenshots.