64 free AI tools you can use right now

zalt.me/tools/ is a collection of 64 free browser-based AI and utility tools split across five categories: AI Tools, Image & Media, Developer Tools, Text Tools, and Utilities. Every tool runs entirely inside your browser using WebAssembly or WebGPU, so nothing you type, upload, or record ever leaves your machine or touches a server. There is no signup, no account, no API key, and no trial that runs out. Below is a category-by-category tour so you can find the right tool for what you are actually trying to do, instead of scrolling a grid of 64 icons.

I am Mahmoud Zalt, an independent senior AI systems architect who has shipped production software since 2010, that is 16 years, and I founded Sista AI (sistava.com), where autonomous AI agents run in production, not demos. I built and I maintain this tools collection myself. Partly because I got tired of AI tools that quietly upload whatever you paste in to someone else's server, and partly because these are the same categories of problems, text, speech, images, code, that I work on with clients every week.

Why local-first AI tools matter

Most "free AI tool" sites work the same way: you upload your file or paste your text, it gets sent to a server, a model processes it somewhere you cannot see, and the result comes back a few seconds later. You have no idea how long that data is kept, who can access it, or whether it quietly ends up as training data for the next model version. That is a real problem the moment your input is a client contract, a medical note, source code under NDA, tax documents, or someone else's face in a photo. Most people do not think about this until something goes wrong, and by then the data has already left their machine.

Every tool in this collection avoids that entirely. The AI models, whether it is a language model, a speech model, or an image model, are downloaded once and run directly in your browser using WebAssembly and WebGPU, the same technologies that let a browser run near-native code and talk directly to your device's GPU. There is no upload step because there is no server to upload to. Close the tab and the data is gone, there is nothing sitting on a database somewhere waiting to be breached. This is also why there is no signup: an account only makes sense if a company needs to track usage, store your files, or meter API calls, and none of that happens here. It is slower on the first load, since the model has to download to your browser, typically once, then it is cached. Every run after that is fast, fully offline-capable, and free, because there is no API bill running up in the background that eventually has to be passed on to you.

AI Tools: chat, speech, and language, 24 tools

The largest category, and the one most people come for first, since this is where most of the everyday AI use cases live: talking to a model, transcribing a meeting, cleaning up a draft, or translating a message before you send it. Standouts:

• AI Chat: a full chatbot running on WebLLM and WebGPU, with 14 models to choose from ranging from 135M to 8B parameters, so you can trade speed for quality depending on your device.
• Chat With Your Document: upload a PDF or text file and ask it questions. Built on Transformers.js and WebLLM, so the document never leaves your browser either.
• Speech to Text: OpenAI's Whisper model running via Transformers.js, transcribing 99 languages without sending a single second of audio anywhere.
• Text to Speech: the Kokoro model, with 28 voices to pick from, generating natural audio entirely on-device.
• PII Redactor: combines regex with a BERT named-entity model to strip names, emails, and other identifying details before you paste something into a public chatbot.
• Summarizer and Translator round out the everyday-use tools, alongside a Grammar Checker for cleaning up writing before you send it.

Image & Media: photos, PDFs, and audio, 14 tools

This category leans on small, purpose-built vision and audio models rather than one general model trying to do everything. Standouts:

• Background Remover: uses BRIA RMBG-1.4 to cut out a clean transparent PNG in seconds, no green screen needed.
• AI Image Upscaler: the Swin2SR model doubles image resolution while keeping edges sharp, useful for old photos or low-res product shots.
• Subtitle Generator: also built on Whisper, turns a video or audio file into ready-to-use SRT or VTT subtitles.
• AI Cartoonizer: runs AnimeGANv2 to turn a photo into an anime-style illustration, entirely client-side.
• Image Compressor and the PDF Merge & Split tool cover the boring-but-constant needs: shrinking file sizes and reorganizing PDFs without installing anything.

Developer Tools: the stuff you reach for daily, 17 tools

These are the small utilities every developer keeps a browser tab open for, minus the ads and the tracking scripts. Standouts:

• JSON to TypeScript / Zod / JSON Schema: paste a JSON payload, get typed interfaces or a Zod schema out, useful the moment you are wiring up a new API response.
• Regex Tester: live matching with capture groups highlighted as you type, no more guessing why a pattern silently fails.
• UUID, ULID & NanoID Generator: generates identifiers in bulk, right when you need seed data or test fixtures.
• Text to Diagram: describe a flow in plain English or Mermaid syntax and get a flowchart, sequence diagram, or ERD back.
• JSON Formatter and a JWT Decoder handle the two things you end up doing several times a week without thinking about it.

Text Tools and Utilities: the small stuff, 9 tools

Smaller categories, but the tools in them get used constantly. In Text Tools: Text Diff compares two blocks of text and highlights exactly what changed, Case Converter switches between camelCase, snake_case, and Title Case in one click, and Word Counter tracks word, character, and reading-time counts as you write.

In Utilities: Password Generator creates strong random passwords with adjustable length and character sets, Color Converter + WCAG Contrast Checker converts between HEX, RGB, and HSL while checking accessibility contrast ratios, and QR Code Generator makes QR codes for URLs, WiFi credentials, or contact cards without a third-party app pulling your data.

Who should bookmark this

Anyone who works with sensitive material and cannot risk pasting it into a public chatbot: lawyers, healthcare workers, HR teams, finance people, and anyone handling client data under contract. Developers who want a fast utility without installing another npm package, spinning up a CLI, or granting a browser extension access to every tab. Freelancers and small teams who cannot justify a dozen separate paid subscriptions for things they each use once or twice a month. Students and writers who want AI help without creating yet another account tied to yet another email address. Non-technical founders who need a quick JSON formatter or a diagram without pulling in a developer. And honestly, anyone who has ever hesitated for a second before pasting something private into an AI tool and wondered where it actually goes and who else might see it. If that describes you, this collection is built for exactly that hesitation, use whichever tool solves your problem today, and come back next time you hit a different one.

Frequently Asked Questions

Are these tools really free?

Yes, all 64 tools are free with no trial period, no usage limits, no watermarks, and no upsell to a paid tier hiding behind the free one. There is nothing to pay for because the AI models run on your device instead of on a server I would otherwise have to pay for on every single request, so there is no usage cost to recover from you.

Is my data safe?

Your data never leaves your browser. Files, text, audio, and images are processed locally using WebAssembly and WebGPU, and nothing is uploaded to any server at any point during processing. Close the tab and everything is cleared from memory, there is no account or database where your input could be stored, logged, or later exposed in a breach.

Do I need to sign up or create an account?

No. There is no signup, no login, no email address collected, and no API key required for any tool. Open the page and start using it immediately, the same way it should have always worked.

Will these tools work without an internet connection?

Most AI-powered tools need an internet connection once, to download the underlying model to your browser, and then they run fully offline after that until you clear your browser cache. Lighter tools that do not use AI models at all, like the Password Generator, Color Converter, or UUID Generator, work offline from the very first load.

Why build 64 free tools instead of one paid product?

Because these are genuinely useful, narrow problems that do not need a subscription attached to them, and because I wanted a privacy-respecting alternative to exist for the kind of everyday tasks people currently trust to random upload-based websites with no clear privacy policy. It is also a fair way to demonstrate the kind of AI systems work I do for clients through Sista AI, in a form anyone can try for free before ever talking to me.

Start with whichever tool solves today's problem

You do not need to read all 64 descriptions to get value here, just find the one that matches what you are stuck on right now and try it, there is no signup wall stopping you.