5 Free Local AI Tools That Run in Your Browser (No Upload, No Signup)

Most "AI tools" you find online aren't really tools — they're websites that take your input, send it to a server, run a model there, and send back the result. That's how services like ChatGPT, copy.ai, and a hundred background-removers work. The model runs somewhere else, and your data is the fuel.

Uttir's new AI tools category flips that. Each tool downloads a small model to your browser the first time you use it, then runs the model on your device. Your text never leaves the page. Your image never leaves the page. Your audio never leaves the page. No account, no API key, no usage limit, no analytics on the input.

Here's a practical tour of the five tools available right now, what each one actually does, and what to expect on the first run.

1. Text Summarizer

Open the tool →

Paste in an article, a long email, a meeting transcript, a research paper. Get a 3-5 sentence summary that keeps the main points.

Best for: condensing long reads into the gist. The model handles up to a few thousand words per pass and produces summaries that read like a human wrote them, not a bullet list.

First-run cost: about 300 MB model download. After that, instant and offline.

2. Sentiment Analyzer

Open the tool →

Paste any text — a review, a tweet, an email, a support ticket. Get back a positive/neutral/negative label with a confidence score, plus a per-sentence breakdown so you can see which parts drove the overall call.

Best for: triaging feedback at scale, sanity-checking your own writing's tone, or building a quick content-moderation check into a workflow. The per-sentence breakdown is what makes it useful — you can see the model agree with most of the text and disagree on one specific phrase, which is usually the interesting part.

First-run cost: about 70 MB model download.

3. Text Similarity

Open the tool →

Type two pieces of text. Get a 0-1 similarity score plus a verdict — near-duplicate, similar, related, or unrelated. Internally it's the same kind of embedding model that powers semantic search.

Best for: deduplicating a content library, checking whether two articles are saying the same thing, comparing rephrased answers to an original. The verdict label is more useful than a raw score because it answers the question you actually have.

First-run cost: about 25 MB model download.

4. Background Remover

Open the tool →

Drop in an image. Get back a PNG with a transparent background, ready to drop into a slide, a product card, or a design tool.

Best for: cutting a subject out of a photo without uploading it anywhere. Works best on portraits, products, and clear subjects. The model is small and fast (1-3 seconds for a typical photo) and the result is a real PNG with a soft alpha mask — hair and fur blend naturally.

First-run cost: about 25 MB model download.

5. Speech to Text

Open the tool →

Upload an audio file (mp3, m4a, wav, webm, ogg) or record directly from your microphone. Get back a transcript with timestamps. Copy as plain text, or download as .txt or .srt for video subtitles.

Best for: turning voice memos into text, transcribing meetings and interviews, generating subtitles for a video. The model is the smallest Whisper variant — fast, multilingual, and accurate enough for clear English speech. It runs on your device, so the audio never leaves the browser either.

First-run cost: about 40 MB model download.

How the "first run" works

The first time you open any of these tools, you'll see a model status card with a "Download model" button. Click it once. The model streams to your browser's Cache Storage and stays there — refresh the page, close the tab, come back tomorrow, the model is still cached. The first download takes a few seconds to a couple of minutes depending on the model and your connection. Every subsequent use is instant and works offline.

You can remove any of these models from your device at any time with the small trash button next to the cache label. It only deletes the model you remove — sharing a model across multiple tools (for example, if a future tool reused the same embedding model as the similarity tool) is handled correctly so you don't end up double-paying in storage.

What "local" actually means

All five tools use small, in-browser models — no API call leaves your device. The model is fetched from a public model hub on first use, then lives in your browser cache. Once it's there, the page can be opened, the model loaded, and inference run with the network turned off.

For a longer treatment of the privacy model, the AI tools category page has the same explanation in a sentence, and each individual tool page has its own privacy note specific to that tool.

What's not in the AI tools category (yet)

A few common AI tools that we deliberately didn't ship:

• Image generation from a text prompt. The smallest practical model (SD-Turbo, distilled) is still 1-2 GB and produces low-resolution output. Not worth the download.
• Isometric / 3D scene generation. Most "AI" versions are actually hand-built 3D scenes with curated primitives; pure text-to-3D models are still 1+ GB and produce wonky geometry. The procedural path (curated primitive libraries + smart search) is a more honest approach, but a much bigger build than the current scope.
• Paraphrase / text rewriter. A small model could do this, but the quality gap between a tiny rewriter and a 7B+ language model is large enough that it would mostly produce mediocre output. Better to wait for a smaller capable model to land.

These are all on the radar. The bar for adding to this category is the same as for what's here: must work in the browser with a small model, must be honest about its limitations, and must respect the privacy promise.

Try them

The full list lives at /ai-tools. Pick a tool, click download once, and the model is yours. Refresh hard (Cmd+Shift+R / Ctrl+Shift+R) if you've been to the site before and the new tools aren't showing up — the previous build's cached HTML doesn't know about them.