Do I need a Google Gemini API key to use it?

No. Without a key, the app sends your messages through a built-in server-side proxy. Adding your own Gemini key is optional and gives you direct control over quota and model settings.

What AI model does RetroTerminal use?

It connects to Google Gemini and defaults to gemini-3.5-flash-lite. You can change the model and tune temperature and token limits in the settings panel.

Can I create my own AI persona?

Yes. The /persona create [name] | [system prompt] command adds a persona with your own instructions, and the settings panel lets you edit the active persona's system prompt.

Where is my chat history stored?

Chats, personas, and saved keys are kept in your browser's local storage on your device. Clearing site data or switching browsers removes them, so nothing is synced across devices.

Does RetroTerminal have a mobile app or an API?

No. It's a web-only interface with no native app and no public API of its own. It works on mobile browsers, but there's nothing to install.

Can I use it offline?

No. RetroTerminal needs a network connection because every reply comes from Google's Gemini servers. The terminal styling is local, but the AI part isn't.

RetroTerminal

Paramjot Singh · Other · Chatbot

RetroTerminal is a free web app that dresses Google Gemini in a retro CRT terminal, with six color themes, swappable AI personas, saved chat history, and support for your own API key.

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About RetroTerminal

What Is RetroTerminal

RetroTerminal is a browser-based chat interface styled like an old command-line computer. You type messages into a glowing terminal panel and get AI replies, but the whole experience is wrapped in amber, green, or blue phosphor screens that look like a monitor from the early 1980s. Under the skin, it talks to Google Gemini, so the actual answers come from a modern large language model. The project is built by developer Paramjot Singh and runs entirely on the web at iristerminal.vercel.app, with no install step.

The draw is personality and control rather than a new model. By default the app talks through a server-side proxy, so visitors can chat without pasting a key. If you'd rather use your own Gemini key, you can add one in settings, and it gets stored in the browser rather than sent to the author's servers. Alongside the themes, RetroTerminal ships a set of AI personas. Iris, Luna, Syntra, Captain Nova, and Atlas each carry their own voice and system prompt, so the same model can answer as a calm assistant, a poetic dreamer, or a cyberpunk renegade. You can also create new personas with your own prompt.

The limits are worth knowing up front. It leans on Google's Gemini API, so quality and availability track that service. Memory and personas live in your browser's local storage, which means clearing site data wipes your setup and history. There's no native mobile app or desktop client. And because it's a solo project, features move at the pace of one developer.

Getting Started

Open iristerminal.vercel.app in any modern browser. No account or signup is required.
Wait for the boot sequence to finish. The terminal prints a short status log and then the prompt unlocks.
Start typing in the input line and press SEND. On first use, the app routes your message through its built-in proxy, so you can chat right away.
Optional: open /settings to paste your own Gemini API key, then set the model, temperature, and token limits.
Use commands like /themes, /persona switch, /history, and /memory to change how the terminal looks and behaves.

Product Information

A quick look at RetroTerminal's pricing, supported platforms, and performance.

Free PlanYes

Paid PlansN/A

PlatformWeb (browser)

DeveloperParamjot Singh

CategoryOther · Chatbot

Release DateJan 2025

Latest UpdatedJul 2025

Website Visits141

Website Global RankN/A

API AvailabilityNo

Best for

The users, tasks, and scenarios where this tool fits best.

Users

AI chat hobbyists
Retro computing fans
Roleplay and persona tinkerers

Tasks

Everyday Q&A and drafting
Testing custom prompts
Sharing a screen or stream

Scenarios

A quick chat on a borrowed computer
Switching moods mid-session
Keeping a local record of chats

Key features

Six Retro CRT Themes

The interface ships with Amber, Green, Blue, White, Red, and Soft color schemes that recreate phosphor monitor looks. You can cycle themes from the top bar or with the /themes command, and switch to a specific one using /theme switch [name].

Swappable AI Personas

Five personas ship by default: Iris, Luna, Syntra, Captain Nova, and Atlas. Each has its own welcome messages and system prompt, so the tone changes sharply between them. A /persona create command lets you add a persona with your own instructions, and each one can carry a random greeting.

Bring Your Own API Key

The app can run through a built-in server-side proxy, or you can paste your own Google Gemini API key in settings. Your key is kept in browser storage rather than a shared server, which gives you direct control over usage and quota.

Chat History Save and Reload

The /history panel stores past conversations and lets you reopen them later. Messages keep their original formatting when reloaded, so you can pick an earlier thread back up without retyping context.

Terminal Command System

A small command set drives the app: /help, /new, /settings, /history, /themes, /persona, /memory, and more. It's a fast way to reach settings and switch modes without hunting through buttons.

Persona Memory

With memory enabled, RetroTerminal summarizes a conversation and stores the gist for a persona, so later sessions can reference what you discussed. It's a light continuity feature rather than a full knowledge base.

Settings Panel

A settings screen exposes model choice, temperature, token limits, and the system prompt. You can tune randomness and response length, which matters when you want tighter or more creative replies.

Pros and cons

Pros

Free to use in a browser, with no account and no install.
Six CRT themes and a boot sequence give it a look most chat apps don't have.
Swappable and editable personas add variety that a plain chatbot lacks.
Your own Gemini key can be used, and it's stored locally instead of on a shared server.
Chat history and persona memory keep conversations carrying over between visits.

Cons

Answer quality and uptime depend entirely on Google's Gemini service, so outages or model changes hit the app too.
Data lives in browser local storage, so clearing site data erases history, personas, and saved keys.
There's no native mobile or desktop app, and it's a single-developer project, so updates can be slow.
The persona prompts can be heavy on theatrics, which won't suit users who want plain answers.

Frequently asked questions

Yes. RetroTerminal is free to use in a browser. There's no paid tier, and you can chat without an account because the app routes messages through its own proxy by default.

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