FULL-PAGE CAPTURE APP FOR macOS
A reference page you meant to revisit disappears after a redesign.
Sound familiar? Bookmarks stop working when URLs change, while isolated screenshots often leave you wondering when you took them or which site they came from.
Web Capture Library is a macOS app that captures a page from top to bottom from just its URL and stores it in a library on your Mac.
Recapturing the same page never overwrites an earlier capture. Each one becomes a new version, so even after the site changes, you can revisit exactly how it looked before.
Recommended for People who want to keep the look of public reference pages as a personal archive they can revisit later. Not for day-to-day capture of login-required pages, or unattended site-wide archiving. Capture is always confirm-then-save; nothing is captured automatically.
A free Chrome extension is also available. Add to Chrome ↗
01 — Full-page captures
Save the whole page as one image, including everything below the visible area that you would normally have to scroll to see.
Long pages can also be exported in two or three sections.
Pages with fixed or sticky menus, animations, or lazy-loaded content may not look exactly as they do in a browser. Review the page before capturing, and hide elements when needed.
02 — Three-width captures
Capture multiple widths in one pass and save them as a single version, keeping a side-by-side record of how the page looks at each breakpoint. The default is two widths (PC and phone); switch to all three widths or PC only in Settings.
03 — Capture version history
Earlier captures remain when you recapture a page. They build into a version history in the order you took them. Name an important version, such as “Before redesign,” and lock it for safekeeping.
04 — Compare versions
Stack captures from two versions and visually inspect what changed since the previous capture.
05 — Overlay captures
Make a capture translucent and place it over another app. You can spot differences from the design right where you are working.
06 — Export as video
Use the recording window to scroll a page from top to bottom, record it as an MP4, and save it with that version. You can also export a GIF from the recorded MP4.
07 — Capture reminders
Set a daily, weekly, or monthly reminder. After the scheduled time passes, the page enters the Capture Queue so you do not forget it. Capture remains manual.
08 — Register multiple pages
Find candidates in a sitemap.xml or URL list and register only the pages you need. Even admin pages scattered across the same domain stay easy to see as one site.
09 — Open storage format
Web Capture Library uses no proprietary database or file format. Captures are PNGs; metadata and extracted page text are JSON. Open everything in Finder — backup and migration are just ordinary file copies. Even if you stop using the app someday, every screenshot you've taken stays right there on your Mac. Process them with scripts, feed them to an AI — what you do with your data is up to you.
| Supported OS | macOS 15.5 or later (captures use WebKit built into the OS) |
|---|---|
| Distribution | Mac App Store |
| Price | JPY 2,500 (tax included; one-time purchase). Updates provided for the 1.x series are included at no additional charge |
| Storage formats | JSON (metadata and extracted text) + PNG (lightweight quantized by default, or lossless; 1x / 1.5x / 2x). Video can be exported as MP4 or GIF |
| Storage location | A folder you choose on your Mac (cloud-synced folders are not recommended) |
| Capture limit | The default height limit is 25,000pt (configurable, with a safety cap). Content beyond the limit is truncated, and the metadata records that the capture is partial |
| Capture fidelity | Pages with heavy fixed or sticky menus, or lazy loading, may differ from the live view. Login state and cookies are not retained |
| Capture reminders | Add pages to the Capture Queue smart folder after the scheduled time passes, on a daily, weekly, or monthly schedule |
| Network access | Limited to pages you open, metadata resources such as OGP images and favicons, and sitemap / robots.txt files requested during page registration. Registered pages enter the Capture Queue and are never captured automatically |
| Encryption | Source data is stored unencrypted. OS-level disk encryption such as FileVault is recommended |
| Intended scale | Tens to hundreds of items. Not intended for archives containing thousands of items |
Web Capture Library is for macOS only. There are no plans for a Windows version.
It is stored as JSON and PNG files in the local folder you choose.
No. Data is stored as files in a local folder, so you can use your own backup solution if needed.
It is not designed for that. To avoid placing unattended load on other servers, the app does not crawl automatically, and its intended scale is tens to hundreds of items. Use a dedicated tool for large-scale crawling.
Pages with fixed or sticky menus, heavy JavaScript, or lazy loading may not match the live browser view. Login state and cookies are not retained, so it is not suited to day-to-day capture of login-required pages.
It prioritizes version history per URL, multi-width (PC / tablet / phone) captures, version comparison, and a local reference library over speed. Capture is confirm-then-save; there is no unattended automatic capture.
A version is typically a few MB to 10 MB (lightweight PNG, three widths). A page captured daily uses roughly 2 GB per year; captured weekly, about 300 MB. Adjust the capture widths, storage format, quality, and height limit in Settings.
The price is JPY 2,500 (tax included) as a one-time purchase. Updates we provide for the 1.x series are included at no additional charge. It is currently sold through the Mac App Store. Buy on the Mac App Store
