Free AI Prompt Manager Tool

[OnlyOneKenobi]

I’ve been working on a side project that might be useful to some people here who are experimenting with AI, especially if you prefer running things locally.

It’s called Prompt Hub.

It’s a self-hosted, local web app for managing and refining prompts for any kind of AI tool:

• LLMs / chat models
• Image generation
• Video generation
• Music / Audio / sound / voice
• Basically anything where you work with prompts

Nothing is tied to a specific model or vendor. Prompts are just data.

Important clarification​

Ollama integration is completely optional.

Prompt Hub works perfectly fine as a pure prompt library without any AI running at all.
If you do have Ollama installed locally, it can optionally:

• help refine prompts (shorten / expand / rewrite)
• draft prompts from images using vision models

If you don’t use Ollama, you can ignore those features entirely.

What it does

• Organises prompts using categories, tools, tags, and thumbnails
• Supports prompt variants so you can iterate without overwriting originals
• Detects [[placeholders]] in prompts and lets you fill them in live (Mad-Libs style)
• Live rendering of the final prompt as you type variables
• Notes/instructions are collapsible to keep the UI clean
• Bulk actions for organising and exporting prompts
• Database export / import / backup:
  • export selected prompts as a portable ZIP (mini database + media)
  • merge imports safely into your existing library (conflicts handled)
  • useful for backups, sharing prompt packs, or moving machines
• Smart media handling (e.g. animated GIFs auto-converted to WebP to save space)

What it doesn't do

• No cloud sync
• No accounts
• No telemetry
• No subscriptions

Everything runs locally. By default it only binds to 127.0.0.1.

Tech stack (for the curious)​

• Python + Flask
• SQLite
• Vanilla JavaScript (no frontend build step)
• Optional Ollama integration for AI features

Who it’s for

• Anyone working with prompts across multiple AI tools
• People who want a local, vendor-agnostic prompt library
• Folks who don’t want their prompts living in the cloud

Repo

Open source and free:
https://github.com/FLi79Za/PromptHub

Current version is v1.3, and it’s stable and usable.
Feedback, bug reports, and ideas are welcome.

If there’s interest, I’m considering next steps like:

• a simple local API (for tools like ComfyUI)
• prompt usage history
• lightweight prompt chaining

Here is an example screenshot

 

[OnlyOneKenobi]

Quick update on Prompt Hub.

I haven’t implemented the specific “next steps” I mentioned in that first post yet, but the project has evolved quite a bit since then in a slightly different direction than originally planned.

Instead of branching outward, I ended up going deeper into prompt composition and reuse.

What’s changed since the first post

Prompt Hub is no longer just a place to store prompts, it’s now closer to a local prompt composition system.

Some of the bigger additions:

Descriptor packs

• You can now define reusable descriptor packs (characters, creatures, environments, props, scenes, etc.)​
• Descriptors are structured, editable, and searchable​
• Descriptors can be injected directly into prompts using simple tokens​
• This makes building complex prompts much faster and more consistent​

Prompt remixing (optional, local AI only)

• If you run Ollama locally, Prompt Hub can randomly combine descriptors and help rewrite them into a clean, coherent prompt​
• This is fully optional and completely disabled if Ollama isn’t available​
• No descriptors or prompts are sent anywhere​

Stronger iteration workflows

• Variants are easier to manage and view as families​
• You can save edits directly from the “use” screen​
• Overwrite, save as variant, or save as a new prompt without friction​

Organisation & UI improvements

• Visual colour themes (purely cosmetic, but nice if you stare at it all day)​
• Groups for organising related prompts under shared concepts or projects​
• Improved tagging and filtering, especially useful once your library grows​
• Bulk updates for categories, tools, tags, and groups​
• More robust import / export and backup handling​
• Safer merging of imported prompt libraries​

What hasn’t changed

Some things are still very deliberate design choices:

• No cloud sync​
• No accounts​
• No telemetry​
• No subscriptions​
• Everything runs locally​
• Ollama integration remains completely optional​

Prompt Hub still works perfectly fine as a plain local prompt library with zero AI running.

Current state
The project is now at v1.6.0 and feels genuinely solid for daily use.

It’s still very much aimed at:

• People working with prompts across many different AI tools​
• Anyone who wants a vendor-agnostic, local-first workflow​
• Folks who don’t want their prompts living in someone else’s cloud​

Repo is still open source and free:
https://github.com/FLi79Za/PromptHub

I’ll post another update once I circle back to things like a local API or prompt chaining, but for now I wanted to share how the project has grown in practice rather than sticking rigidly to an early roadmap.

Feedback and ideas are still very welcome.

 

[OnlyOneKenobi]

I've updated the util quite a bit, and also recently created a Firefox browser extension which connects to the desktop app. I also have an iOS version soon to be released to Testflight, and hopefully the official app store thereafter.

Here is a link to the Firefox extension : https://addons.mozilla.org/en-GB/firefox/addon/prompthub-connector/

Ensure you update your desktop app with git pull to get the latest updates for the app to work with the extension correctly.

 

[OnlyOneKenobi]

The app has been released on Testflight for iOS, if anyone wants to try it out, you can use this link : https://testflight.apple.com/join/dtjPzH5H