Every team running Odoo hits the same friction: attachments pile up on partners, sale orders, invoices, tasks, and helpdesk tickets, but to actually read one you have to download it, wait for a local app to launch, then Alt-Tab back to Odoo to act on what you saw. Out of the box, Odoo's chatter and the ir.attachment sidebar only give you a filename and a download link. Image files get a thumbnail; a PDF quotation, a Word contract, an Excel BOM, or a PowerPoint proposal does not. Across a busy back office that is thousands of unnecessary downloads a week, a graveyard of duplicate files in the Downloads folder, and real compliance risk when sensitive documents leave the browser to sit on personal machines.

We build a preview layer that renders the four most common office formats inline, wherever attachments appear. Technically, the work centers on a small set of models that extend ir.attachment with compute fields (@api.depends on mimetype/datas) to classify each file into a previewable type, plus an OWL component that mounts a lightweight in-browser viewer into the chatter, the Documents app, and any form view's attachment area. PDFs render with a client-side canvas renderer; Word, Excel, and PowerPoint are converted to a browser-safe representation on the server (an on-demand controller that streams the rendered output, cached against the attachment checksum so the same file is never re-rendered). Everything respects existing access — the preview controller re-checks ir.model.access.csv rules and any record rules on the source document before a single byte is served, so a user who cannot read the underlying record cannot preview its attachment either. Views are delivered as XML/OWL that inherit rather than replace core templates, so upgrades stay clean, and the whole package ships as a proper module with its own __manifest__.py declaring dependencies, assets bundles, and version pinned to your target (17.0, 18.0, or 19.0).

Because this is built to order, we scope to your reality rather than a generic download. If your attachments live behind an S3/ir.attachment external store, or you need preview inside a custom module's form, or you want the office-format conversion to run on a dedicated worker so it never blocks the main Odoo workers, we design for that up front. We confirm Community vs Enterprise (the Documents app and some spreadsheet behavior differ), agree the exact models where preview should appear, and set page-size and rendering limits so a 200-page scanned PDF degrades gracefully instead of freezing a browser tab. Optional extensions we frequently add: full-text search indexing of previewed content, watermarking on preview, download-blocking for flagged document types, and an audit log of who previewed what via an automated action or a small server model.

Delivery is a build-to-order engagement, not an instant download. After a short scoping call we send a fixed quote and a signed scope; typical delivery is 2–4 weeks from confirmed scope, depending on how many models and formats you want covered and how your attachment storage is configured. You get the work first on a staging database for UAT, then a supervised production install with a rollback plan. Pricing starts from $249 (indicative, single-company base scope); multi-company deployments, external attachment stores, custom-module coverage, and heavy office-to-preview conversion volume increase the quoted scope.