Features

HTTP fetch on demand

Fetch and cache files/objects from remote HTTP(S) URL on demand.

Disk cache

Used for temporarily storing files/objects (on disk) so that they can be provided faster for subsequent requests.
Survives server/program restart. Does not consume server memory.

Memory cache

Used for temporarily storing files (in memory) so that they can be provided faster for subsequent requests. Much faster than disk caching, but requires memory (RAM).
Use for files which are requested very frequently.

Compressed storage

Files/objects are stored in Brotli compressed format, for lower disk/memory use and optimized CPU usage (each object only compressed once, rather than every request).

Instant purge

You can instantly purge (clear out) all the cached files/objects by clicking a "Purge" button in the UI or via the REST API "flush" command.

Origin shield

Setup multiple layers of OwnCDN cache servers to shield your origin server (see KB article)

Stampede protection

Multiple requests for the same uncached/expired file/object are queued, and only a single request is sent to the source.
This ensures that only one request at a time can (re)populate the cache, improving performance and stability, and reducing load on the source.

Sliding expiration

Cache expiration time of a file/object is reset each time it is requested. This ensures that frequently requested items are kept in the cache providing faster responses, while infrequently access items are removed, freeing up space.

Versioned / point-in-time recovery

Instead of overwriting previous versions of a file / object, OwnCDN can create a new version for each update (including deletions). This means that it is possible to restore individual files to a previous version - including deleted files.
It is also possible to restore the whole storage service to a specific earlier point in time.
To preserve disk space, you can configure for how long old versions are retained.

S3 compatible API

Implements mosts of the AWS S3 API, making it compatible with all kinds of software that supports the S3 API (tested with a large number of apps).

Live replication

Any file additions, updates, and deletions you make to files on one OwnCDN instance can be instantly synchronized to another instance. This includes versions, so that restoring old versions and point in time recovery also works on the replica server.

Recoverable disk storage format

Files / objects are stored in a SQLite database file in WAL mode (very performant and provides safe database recovery after server crash).

Highly reliable key-value store

Store JSON / BSON objects to take advantage of replication and point-in-time restore features.

Compressed storage

Files / objects are stored in Brotli compressed format, for lower disk use and optimized CPU usage (each object only compressed once, rather than every request).

Optimized for streaming

Large files (such as video) are automatically broken into and stored as smaller pieces to support video streaming / byte-range requests.

Optional file system storage

Optionally serve files directly from disk (upload, download, list files using REST or S3 API, and more).
For situations where you also need direct access to the files from other applications.
Note: Does not support versioning, replication, or compression.

On-the-fly image resizing

Specify target width and optionally height in URL query parameters. The resulting image will be scaled so that neither width nor height is more than the specied values.
You can also configure a fixed maximum image width.

On-the-fly image cropping

Specify cropping, target width and height in URL query parameters. The resulting image will be cropped and scaled to fit, so that only the middle part remains.

WebP / JPEG Compression

Compress images using WebP or JPEG compression.
Use "quality %" setting to control quality of compressed images.

Browser WebP support detection

Automatically serve WebP compressed version of images to browsers that support this (WebP is often half the size of JPEG with same image quality).

Automatic JPEG rotation fix

JPEG images are automatically rotated according to embedded data from camera, ensuring there are no surprise up-side down images.

HTTP API

Provides programmatic access to your OwnCDN instance - for example for uploading files from other applications.

S3 mode

Automatically detects requests using the AWS S3 API syntax.

OpenAPI specification

The HTTP API comes with an OpenAPI specification, making it easy to integrate and test.

API playground / code samples

Test the API directly in your browser, and get code examples in 18 different programming languages.

API key permissions

Limit API access by setting up API keys with individual read/write permissions for each service.

Web UI / Admin dashboard

Configure, operate, and monitor OwnCDN in your browser - locally or remote.

Chain and combine services

Chain and combine services in a way you like.
For example, set up an HTTP binding to source items from a disk cache service - which sources items from an image optimizer service - which sources items from a storage service.

Last 100 HTTP requests

Get a quick overview of the last 100 HTTP requests for any service.
(You can also configure full logging via IIS)

Minimal requirements

If you are already running Windows / IIS, adding OwnCDN will use minimal extra resources.
We run an instance of OwnCDN serving hundreds of requests per second on a $20 Windows VPS with very low resource usage.

Cloud Exit?

Considering leaving the cloud? OwnCDN can be an important piece of that puzzle - with self hosted S3 compatible storage, caching, image processing, etc.

GDPR / DORA / HIPAA / PCI compliance

All data is stored on your server. OwnCDN is designed to work entirely standalone, so that it can operate within your highly-secured and compliant environment without the need for external cloud services.