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Cover images

Preview images for your bookmarks — manual, auto-populated, or generated

Each bookmark can carry a preview image — its cover. Covers are rendered as the hero on Cards and Gallery tiles. When a bookmark has no cover, mnera.io falls back to a deterministic typographic placeholder (initial + colour gradient) so every card still feels designed.

Note: Cover image display in Cards and Gallery views is a Profeature (included in the 14-day trial). Free accounts see only the typographic placeholder in those views. The cover URL itself can still be set and is preserved across exports — it just won't render in card tiles without Pro access.

Setting a cover by hand

  1. Open a bookmark, then click Edit.
  2. Paste a URL into Cover image URL. A live preview appears below the field.
  3. Click Save. The URL is stored on the bookmark as schema:image in your pod.
Tip: Leave the field blank to remove a cover. The typographic fallback will render in its place automatically.

Auto-populating covers (Pro)

The Find cover images Pro feature scans bookmarks in the active collection that don't yet have a cover and tries to extract one server-side:

  1. Open the ⋮ kebab next to the collection picker and choose Find cover images (or use the Scan button on the account settings page).
  2. The server fetches each page through mnera and inspects its HTML for, in priority order: og:image, twitter:image, link rel="image_src", and apple-touch-icon.
  3. If nothing is found at the full URL, mnera retries against the registrable root (e.g. docs.python.org → python.org) — many platform-style subdomains have no OG image of their own but the root does.
  4. If no meta tag yields an image, it falls back to Logo.dev — a brand-logo service that resolves the bookmark's domain to an official company logo when one exists.
  5. All discovered covers are written back to your pod in a single end-of-scan write (replacing the older per-batch behaviour that could hit pod write-lock timeouts on large files).
Note: Pages that block automated requests (paywalls, anti-bot systems) return no image. These bookmarks pass through the scan unchanged — the typographic cover handles them.

Typographic cover fallback

For bookmarks with no real cover, mnera.io renders an inline SVG: a coloured gradient picked deterministically from the URL, with the domain's first letter centred on top and the domain name in small caps below. It's free, zero-network, and gives every bookmark a recognisable visual identity without storing anything in your pod.

Showing or hiding covers

The Gallery view has per-section toggles (Cover / Title / Description / Tags / Bookmark info) above the bookmark grid — use these to tune what each gallery tile shows. Settings persist to your mnera.io account.

Privacy: routing covers through mnera (Pro)

By default, a cover image is loaded by your browser directly from the host it came from — which means that host sees your IP address. Pro accounts can enable the privacy image proxy (Account settings → Privacy) to route covers and favicons through the mnera.io server instead. See Security & privacy for the full story.

Import / export

Cover URLs round-trip through the JSON and Turtle export formats. Re-importing a mnera.io export preserves whatever covers you had. Imports from other tools (Raindrop, generic JSON) read a cover or image field when present.