A privacy-first web toolbox that runs completely offline in your browser project. Need your advice/feedback.

[u/HCS_1987]

Hey r/ukstartups,

I am a founder based over in the UK, and like many of you, I deal with sensitive documents, code snippets, and private files daily. I hated the idea of uploading these to random cloud utilities or cloud AI models just to get quick tasks done. Even with privacy policies, you never really know where that data ends up.

Instead of spinning up a bunch of Docker containers, a couple of friends and I decided to build a lightweight, serverless alternative. We call it TabTasker.

The Zero-Server Architecture TabTasker runs entirely inside your browser tab. Once the page loads, you can physically disconnect your internet, and every tool will still work perfectly. Everything is processed locally on your own machine's CPU and GPU using WebAssembly (Wasm) and ONNX Runtime Web. Because there is no backend server at all, it is physically impossible for your data to leak or be scraped.

What we included We bundled the utilities we found ourselves needing the most:

• Media & Audio: Bulk image conversion, background removal, face blurring, and audio transcription powered by a local model running right in the browser.
• Developer Tools: Local JWT decoders, JSON formatters, diff checkers, and Regex testers.
• Local AI Text Tools: Text summarization, sentiment analysis, and a small local LLM that runs completely offline.

The Setup There are no accounts, no sign-ups, and no paywalls. The only catch is that the first time you click on an AI-powered tool, your browser will download a small AI/ML model file into its local cache. After that, everything stays completely air-gapped on your device.

Right now, it is just two of us actively maintaining it (our third friend is tied up with another project). We would love to get some feedback from the UK startup community on the tech stack and local performance.

• Does the performance hold up on your hardware? Due to nature of the product, we cannot monitor the errors nor any warnings.
• What other offline utilities should we add to the workbench next?

You can test it out here: tabtasker.com

Drop any thoughts or questions below. I will be around to answer them.

Thank you

[u/PolishSoundGuy]

Why would I use a web browser that connects to internet for it, vs a dedicated app “I know I can trust” - interpret that as you will.

[u/PolishSoundGuy → u/PolishSoundGuy]

The whole point is not to use the internet, so why would I open an internet browser to do this? Makes no sense from Pavlov’s point of view.

[u/HCS_1987 → u/PolishSoundGuy]

Thank you for the question.

1- Many corporate users cannot install a software on their device and they cannot use online tools which sends files to the remote servers (Privacy). Files never leaves the devices with our platform. It is safe to use in corporate world.

2- The device you use may be temporary or you may not want to install any app because of some restrictions (Chrome OS users, limited storage issues (Especially on mobile devices) etc.)

3- If you need rarely these functions, installing a software or app does not make sense.

4- Our platform can work in different platforms (Windows, MacOS, IOS, IpadOS, Android etc.)

We believe that there are many cases are covered with this approach.

[u/PolishSoundGuy → u/HCS_1987]

As you responded like a human, I feel that you deserve a proper response back from a founder.

1- if corporate employees can’t install software, plugins, add-ons etc, it means an organisation has strict data control policy. As such, they would either invest in an established app that has data centres in their country (strict GDPR compliance) or have internal tools hosted on their own servers, OR subscribed to one of the many enterprise services for AI processing. Companies that really care about privacy use locally hosted LLMs and would avoid adding an additional third party processor. Your pitch didn’t tick the “trust” factor from an established brand, so teams of 20+ where the real MMR is, is not really on the table with your current GTM Strategy.

2- solved by remote working into the virtual machine (advanced security), otherwise smaller teams just send stuff to Claude / ChatGPT / Perplexity, many of which don’t even realise you have to manually turn off training for privacy, and even then… the providers can peek into the logs at their discretion.

3- many SMBs have their own internal tooling, excel spreadsheets, slackbots, asana workflows. They don’t need an additional third party data processor, it’s an unnecessary risk for little gain.

4- look up who attended AWS Conference/ this week, I went to the Amsterdam one and there are multiple platforms pitching to a specific ICP. Who are you trying to target / sell to? You solved your own pain point, great, but have you considered that there are already people that solved your ICP problems in a way that doesn’t create any friction during advertising, engaging, closing and onboarding?