Showing exactly what broke
Paste the screenshot, circle the element, arrow to the console error, type the repro steps beside it. Send one file that opens in any browser.
Browser app
Mark up a screenshot. Build a deck. Ship it as one file.
A lightweight slide and annotation designer that runs entirely in your browser. Drop in images, circle what matters, leave comments, and export a deck that opens anywhere, with none of a PDF's page limits.
The PDF step is the problem.
Explaining something visual, a bug, a flow, a diagram, usually means projecting an image, circling a few things and writing notes around it. The usual tool is a slide deck.
Getting that deck anywhere else means exporting to PDF, and PDFs carry a hard page-count ceiling that trips up document uploads, including into language models. HTML has no such limit.
So HaloDeck cuts the middle out. Design in the browser, export one self-contained HTML file. Open it, upload it, present it, or reopen it later and keep editing.
In practice
Three moments it saves you
Feedback that lands in context
Drag in a folder of mockups, annotate each one, keep the commentary as notes per slide. No page cap, however many screens the review covers.
A long deck that actually uploads
Forty annotated slides as a single HTML file, past the point where a PDF export would have been refused.
A walkthrough video for this one is in production.
How it works
Drop in
Paste a screenshot straight from the clipboard, or drag in one file or a whole folder from the desktop.
Mark it up
Circles, rectangles and arrows stack as reorderable, lockable layers. Click straight into any text layer and the cursor lands where you clicked.
Export
Pick the format and which slides go out. One HTML file with navigation and presenting built in, or a zip of images.
Built for one sitting, start to finish
No account, no backend, nothing to install.
Multi-slide canvas
Build out as many slides as the explanation needs, reordered by drag.
Layered annotations
Circles, rectangles and arrows stack as reorderable, lockable layers, so nothing you already placed shifts by accident.
Any page size
Widescreen, 4:3, square, vertical 9:16, 4:5 or A4, changeable at any point rather than chosen up front.
Notes per slide
Keep commentary as real exported text, or drop it onto the slide itself as a layer.
Export as one HTML file
Keyboard and swipe navigation, an all-slides view and full-screen presenting, with no page limit. Reopen it in HaloDeck to keep editing.
Export as zipped images
PNG or JPG at 1x or 2x, one per slide, plus a notes.txt. Exporting a single slide just gives you that image.
Pick which slides export
Every export opens a slide picker. All slides by default, shift-click for a range, or just the ones you need.
Autosaves as you work
Everything including images is kept in your browser, with no account. Save a portable project file to carry the work to another machine.
Practical details
- RunsEntirely in the browser. No sign-up and no backend.
- StorageAutosaves locally as you work, including images. A portable project file moves it between machines.
- ExportsA self-contained HTML deck, or a zip of PNG or JPG images at 1x or 2x with notes.txt.
- Designed forDesktop-first, built for a mouse and a big canvas, still fully usable on tablet or phone.
See HaloDeck in action
HaloDeck is not publicly listed yet. Ask for a walkthrough and I will show you a deck built and exported end to end.
