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v1.21.3May 28, 2026

One-Click Postman, Bruno & Insomnia — HTML Preview

One-Click Postman, Bruno & Insomnia — HTML Preview. This release brings Open HTTP Collections By Clicking The File and Preview HTML Files In The Browser Panel.

Download v1.21.3

The download page always has the newest build; installers for this version are on GitHub.

What changed

New features

11
  • Click a Postman, Bruno, or Insomnia collection in the file explorer and every request opens in the HTTP client immediately — no manual import dialog, no copy-paste, no setup
  • Supported formats — Postman v2.1 (.postman_collection.json), Insomnia v4 (.json), and Bruno folders/files (.bru)
  • Folder structure is preserved in the HTTP sidebar — your nested folders from Postman or Bruno show up as a tree, not a flat list
  • Environments come along for the ride — variables from Postman environments, Insomnia environments, and Bruno environments/*.bru files are imported alongside the requests
  • Right-click → "Open in HTTP Client" for any recognized collection file from the file explorer context menu
  • Dedicated file icons for .bru, .postman_collection.json, and Insomnia exports so collection files stand out in the file tree
  • Re-clicking an already-imported file instantly switches the HTTP panel to that request instead of re-importing — fast jump between requests directly from the file tree
  • Import summary toast tells you exactly what landed: "Imported 47 requests + 2 environments from MyCollection.postman_collection.json"
  • Right-click any .html or .htm file in the file explorer and pick "Open in 1DevTool's Browser" to render it inside the built-in browser panel — perfect for previewing static sites, exported reports, or scratch HTML
  • "Open with Machine's Browser" is right there too if you'd rather open it in Chrome, Safari, or your system default
  • Same context menu pair is available for PDFs, audio, and video files

Improvements

2
  • Project dropdown in the breadcrumb now matches your sidebar order — projects appear in the same group-aware order shown in the project list (root groups first by order, then ungrouped projects), instead of insertion order
  • Force scroll to bottom on terminal click is now off by default for new users — you can scroll up through AI agent output without the terminal yanking you back to the bottom on every click. Existing users keep their current setting; toggle it anytime in Settings → Terminal

Bug fixes

1
  • Fixed clicking an imported Bruno or Postman request file doing nothing — the HTTP panel now refreshes from project state when you click an already-imported request, instead of silently keeping the previous request on screen

Screenshots

File explorer right-click context menu on 1devtool.html showing Open in 1DevTool's Browser and Open with Machine's Browser entries highlighted
File explorer right-click context menu on 1devtool.html showing Open in 1DevTool's Browser and Open with Machine's Browser entries highlighted
Bruno postman and insomnia collection folders in the file tree with the HTTP client Collections panel auto-populated and a List posts request open
Bruno postman and insomnia collection folders in the file tree with the HTTP client Collections panel auto-populated and a List posts request open
Right-click context menu on an HTML file with Open in 1DevTool's Browser and Open with Machine's Browser options
Right-click context menu on an HTML file with Open in 1DevTool's Browser and Open with Machine's Browser options
Postman collection clicked in the file explorer, auto-importing requests into the HTTP client sidebar with folder structure preserved
Postman collection clicked in the file explorer, auto-importing requests into the HTTP client sidebar with folder structure preserved