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Umbraco

Meet Engage.AI: an AI copilot built for marketers

Umbraco Engage.AI is in public beta: an AI copilot answering marketer questions about campaigns, segments and A/B tests, straight from your Engage data.

by Corné Hoskam

Umbraco 17 Output Caching

Umbraco 17 on .NET 10 is quick, so we did not need page caching at all. We built it anyway to see what was possible before trying it on a client site. The implementation, the rules for when not to cache, and what it cost.

by Justin Neville

Rebuilding our Umbraco Website

Our own website spent years at the bottom of the list. Last year we rebuilt it on Umbraco 13, moved it to 17, rewrote every page and did the SEO work properly. Here is what we did and what we would do differently.

by Justin Neville

Umbraco CSP Nonces with Output Caching

Cache a page containing a CSP nonce and every later visitor gets a stale nonce that no longer matches their header, so the browser blocks the lot. Most advice says pick one. Here is how to have both.

by Justin Neville

Rebuilding our Umbraco Website - Part 1

Our own website spent years at the bottom of the list. Last year we rebuilt it on Umbraco 13, moved it to 17, rewrote every page and did the SEO work properly. Here is what we did and what we would do differently.

by Justin Neville

Umbraco 17 Output Caching - Part 2

Umbraco 17 on .NET 10 is quick, so we did not need page caching at all. We built it anyway to see what was possible before trying it on a client site. The implementation, the rules for when not to cache, and what it cost.

by Justin Neville

Umbraco CSP Nonces with Output Caching - Part 3

Cache a page containing a CSP nonce and every later visitor gets a stale nonce that no longer matches their header, so the browser blocks the lot. Most advice says pick one. Here is how to have both.

by Justin Neville

Umbraco 2-way relations - Umbraco Features You Didn't Know You Needed

Relations in Umbraco: asking the question your picker can't answer You've probably used a Content Picker (or a Multinode Treepicker) to wire content together. A page picks a banner, a landing page picks a set of related articles, a policy picks the older policy it replaces. That gives you one direction for free: open the page, and you can see exactly what it points at. But pickers only answer one question. "What does this page use?" is easy. "What uses this?" is not. The picker property lives on the node that did the picking, not on the node that got picked. If you want to go the other way, your only option is make the pages hierarchical or to loop over every piece of content in the tree and check whether its picker field happens to mention the node you care about. That's exactly the gap Umbraco's Relations are for. A Relation is a first-class, queryable link between two entities that you can walk in either direction via IRelationService: GetByParentId for "what does this point at", GetByChildId for "what points at this". This post walks through a small example project that uses a Relation to answer a question a picker alone can't. The scenario: policies that supersede each other Imagine a "Policy Page" doctype. Editors write a new policy, and pick (via a normal Multinode Treepicker) which older policy or policies it supersedes. That's a completely standard one-way relationship: new policy → picks → old policy. The picker answers "which policies does this one supersede" perfectly well. What it can't answer is the question an editor actually asks when they land on an old policy page: "Has this been superseded, and by what?" Nothing on that old policy's own data points back to the newer one — the pick lives entirely on the other node. Short of scanning every Policy Page in the site for one whose supersedes field happens to mention this node's ID, there's no way to answer it. Why not just use Umbraco's built-in "Related Document" relation? Umbraco ships a built-in relation type for exactly this kind of document-to-document link, aliased umbDocument. It would technically work — except it's a single shared, undifferentiated bucket. Anything in Umbraco (media picker usages, link pickers, whatever else) can write a generic document-to-document reference into it, so a reverse lookup on umbDocument can't reliably tell you "which policy superseded this one" versus any other unrelated reference someone else recorded into the same bucket. The fix is a relation type of your own policySupersedes so a reverse lookup on that alias only ever returns the thing you actually care about. The implementation The example lives in four files. 1. The doctype and the picker. Add a "Policy Page" content type with a bodyText richtext property and a supersedes Multinode Treepicker, filtered so it can only pick other Policy Pages. This is the plain, one-way picker. Nothing special yet. 2. Syncing the picker into a Relation. PolicySupersedesRelationSyncHandler listens for ContentSavedNotification. Every time a Policy Page is saved, it wipes out whatever relations already exist for that node under the policySupersedes alias and rebuilds them from whatever's currently picked: public void Handle(ContentSavedNotification notification) { foreach (IContent content in notification.SavedEntities) { if (content.ContentType.Alias == PolicyPageContentTypeAlias) { SyncSupersedesRelations(content); } } } private void SyncSupersedesRelations(IContent newPolicy) { IRelationType relationType = _relationService.GetRelationTypeByAlias(ExampleConstants.RelationTypeAlias) ?? CreateRelationType(); foreach (IRelation existingRelation in _relationService.GetByParentId(newPolicy.Id, ExampleConstants.RelationTypeAlias)) { _relationService.Delete(existingRelation); } foreach (int supersededPolicyId in GetPickedContentIds(newPolicy)) { var relation = new Relation(newPolicy.Id, supersededPolicyId, relationType) { Comment = $"Marked as superseded on {DateTime.UtcNow:u}", }; _relationService.Save(relation); } } As shown above, you can also add a comment to a relation, which we use to store additional information on when the policy was superseded in our example, which can then be shown again on the Policy page. The relation type itself is created on demand as non-bidirectional, Document-to-Document, and importantly isDependency: true: private IRelationType CreateRelationType() { var relationType = new RelationType( "Policy Supersedes", ExampleConstants.RelationTypeAlias, isBidrectional: false, parentObjectType: Constants.ObjectTypes.Document, childObjectType: Constants.ObjectTypes.Document, isDependency: true, key: null); _relationService.Save(relationType); return relationType; } 3. Wiring it up. Add the notification handler with the standard IComposer boilerplate, nothing Relations-specific. 4. Reading both directions in the view. This is where the payoff shows up. policyPage.cshtml reads the picker property directly for the forward direction, and calls RelationService.GetByChildId for the reverse direction, the direction the picker alone could never give you: var supersededByRelations = RelationService.GetByChildId(Model.Id, ExampleConstants.RelationTypeAlias); @if (supersededByRelations.Any()) { <div style="border: 2px solid red; padding: 1em; margin-bottom: 1em;"> <strong>This policy has been superseded.</strong> <ul> @foreach (var relation in supersededByRelations) { var newerPolicy = ContentQuery.Content(relation.ParentId); if (newerPolicy is not null) { <li> Replaced by <a href="@newerPolicy.Url()">@newerPolicy.Name</a> <br /> <small>@relation.Comment</small> </li> } } </ul> </div> } Open an old policy that's been superseded, and the page now knows it without ever scanning the rest of the tree. The other payoff: you can't delete a still-referenced policy without a warning Setting IsDependency = true on the relation type isn't just documentation, it plugs straight into Umbraco's own dependency checks. Try to delete or unpublish a policy that's still marked as superseded by another one, and the backoffice will warn you it's in use, the same way it would for a media item still referenced by a Content Picker elsewhere. This is the practical version of "what if you need to delete a shared component, but three pages still reference it": with a plain picker, deleting the referenced item is silent and the reference just breaks. With a proper Relation, Umbraco already knows something depends on it and stops you. When to reach for this A picker is enough when you only ever need to ask "what does this content point at", the normal, forward direction. The built-in "Related Document" relation is fine for generic, low-stakes cross-references where you don't care about precision on the reverse lookup. A custom relation type is worth the extra notification-handler code when you need a reverse lookup you can trust "what points at me" and/or you want deletion/unpublish safety for content that's still depended on. Pickers tell you what a page uses. Relations are what let you ask the question in the other direction.

by Bernadet Goey

Announcing the new ProWorks Umbraco Media Audit package!

Update 09.02.2026: Released the Umbraco v18 version! One of the things I've been asked for by clients more often than I'd expect in the last few months is to help them audit all their media so that they can clean out everything they're not using. The good news is that with access to a database and Claude, writing a little reusable python script the scrape everything was exceptionally easy. But by the third request I'd decided maybe that rather than doing this for my clients I could give them the autonomy and flexibility to do this by themselves on demand. After all, it's a waste of their time and budget to need a developer to audit their media whenever they're wanting to clean it up. The benefit of this package is it gives your content editors the autonomy to audit and clean up their own media on their own schedule whenever they want! So with this, I present to you the new ProWorks Umbraco Media Audit package that I've released for Umbraco 17! This tidy little package adds a dashboard into your media section where you can run an audit on all of your media, discover what's in use and what isn't all in one location without having to click through item after item. There's some caveats of course - the audit script is only searching for anything that's directly referenced with a picker. If a client pasted a URL manually anywhere or is linking to an item in an e-mail marketing campaign, there's currently no way for the Media Audit to tell. So it's important that human eyes look at these items when determining if they're still relevant, and getting detail on an item by item basis is very easy to do. And once an admin-only user has determined none of the media is in use, they can mark them all for deletion and move them into the recycle bin. If they're really content all is well then there's even a purge button to clear the recycle bin and remove the items from disk! We have a few features that we want to add in the future: Field auditing - do you have your alt text or captions filled out? We'd like to make this "plug and play" so you can add any fields that you want and the tool will check if they're empty. Integrating the above with Umbraco AI - if a field is empty, fill it in with Umbraco AI's integrations to read media files and write alt text. Display a thumbnail of the item in the dashboard (if it's an image) to help with visual recognition Check if images don't have crops selected or set Are there any features that you'd love to see? Let us know!

by Proworks

Quick Tip: Extending the Delivery API's Content Response

A quick look at how to extend Umbraco 17’s Delivery API response with content from elsewhere in the content tree, without building a custom endpoint....

by Johan Reitsma

Notify a Teams channel when you publish content, using Umbraco Automate

Use Umbraco Automate to post a notification to a Microsoft Teams channel whenever content is published, with no custom C#. A step by step walkthrough on Umbraco 17.

by Nathaniel Nunes

Why I choose Umbraco over WordPress

Umbraco and WordPress solve different problems, and after years of building on both I know which one I want to still be maintaining in five years.

by Justin Neville