Up1
Up1 encrypts images, text, and other data in the browser before hosting them, and can display short videos and downloadable files.
About Up1
Up1 is an open source web server for hosting images, text, and other files. According to its README, the browser encrypts each upload before sending it, and the server stores only the encrypted data and does not know its contents. Viewers can display images, syntax-highlighted text, short videos, and arbitrary binary files as downloads.
The project is intended to be self-hosted. Setup requires Node.js and editing server configuration files. The README states that the public demo server at up1.ca is no longer available or maintained, though it lists several public hosts that run Up1. The optional upclient command-line tool can upload files and return a URL. ShareX support has been removed.
Key features
- Encrypts images, text, and other data in the browser before upload
- Displays images, syntax-highlighted text, short videos, and binary files as downloads
- Returns a delete token on upload that can later remove the file
- Command-line upload tool, upclient, prints the URL of the uploaded file
- Configurable maximum upload size, with a default of 50 MB
- Optional Cloudflare cache invalidation when uploads are deleted
Best for: Developers and system administrators who want to run their own encrypted image host from the published source code.
Good for
- Source code is publicly available in a GitHub repository under an open source license
- Files are encrypted in the browser before upload, according to the README's design description
- Server behavior is adjustable through a configuration file, including upload size and listening address
Watch out for
- The public demo server is no longer available or maintained
- ShareX support has been removed
- The README describes the api_key upload check as a very basic security measure that may need redesign
Up1 at a glance
- Website
- github.com/Upload/Up1
- Category
- Online Tools › Image Tools
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Up1 FAQ
Is there a public server I can use without hosting my own?
The README says the demo server at up1.ca is no longer available or maintained. It notes that several public hosts use Up1, and that an online search may find them.
Can the server read the contents of uploaded files?
The README states that the server knows nothing about the contents because encryption happens in the browser. This is the project's stated design, not a guarantee, and the README does not describe a formal security audit.
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