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How I use Claude Code: Separation of planning and execution

https://boristane.com/blog/how-i-use-claude-code/
582•vinhnx•10h ago•352 comments

Show HN: Elecxzy – A lightweight, Lisp-free Emacs-like editor in Electron

https://github.com/kurouna/elecxzy
9•kurouna•22h ago•10 comments

Back to FreeBSD: Part 1

https://hypha.pub/back-to-freebsd-part-1
36•enz•4h ago•4 comments

How Taalas “prints” LLM onto a chip?

https://www.anuragk.com/blog/posts/Taalas.html
161•beAroundHere•16h ago•79 comments

Japanese Woodblock Print Search

https://ukiyo-e.org/
109•curmudgeon22•8h ago•20 comments

Two Bits Are Better Than One: making bloom filters 2x more accurate

https://floedb.ai/blog/two-bits-are-better-than-one-making-bloom-filters-2x-more-accurate
112•matheusalmeida•5d ago•17 comments

How far back in time can you understand English?

https://www.deadlanguagesociety.com/p/how-far-back-in-time-understand-english
554•spzb•3d ago•305 comments

Gamedate – A site to revive dead multiplayer games

https://gamedate.org/
134•msuniverse2026•1d ago•14 comments

Show HN: Llama 3.1 70B on a single RTX 3090 via NVMe-to-GPU bypassing the CPU

https://github.com/xaskasdf/ntransformer
257•xaskasdf•14h ago•61 comments

Unreal Numbers

https://lcamtuf.substack.com/p/unreal-numbers
10•surprisetalk•4d ago•0 comments

Evidence of the bouba-kiki effect in naïve baby chicks

https://www.science.org/doi/10.1126/science.adq7188
140•suddenlybananas•13h ago•41 comments

Show HN: Minimalist Glitch Art Maker (100% client-side)

https://yuyz0112.github.io/glitch-art-maker/
15•yz-yu•5d ago•5 comments

Parse, Don't Validate and Type-Driven Design in Rust

https://www.harudagondi.space/blog/parse-dont-validate-and-type-driven-design-in-rust/
195•todsacerdoti•15h ago•46 comments

A Botnet Accidentally Destroyed I2P

https://www.sambent.com/a-botnet-accidentally-destroyed-i2p-the-full-story/
115•Cider9986•10h ago•75 comments

Claws are now a new layer on top of LLM agents

https://twitter.com/karpathy/status/2024987174077432126
310•Cyphase•1d ago•745 comments

zclaw: personal AI assistant in under 888 KB, running on an ESP32

https://github.com/tnm/zclaw
180•tosh•22h ago•99 comments

CXMT has been offering DDR4 chips at about half the prevailing market rate

https://www.koreaherald.com/article/10679206
210•phront•20h ago•191 comments

Toyota’s hydrogen-powered Mirai has experienced rapid depreciation

https://carbuzz.com/toyota-mirai-massive-depreciation-one-year/
152•iancmceachern•17h ago•344 comments

Coccinelle: Source-to-source transformation tool

https://github.com/coccinelle/coccinelle
102•anon111332142•1d ago•28 comments

Carelessness versus craftsmanship in cryptography

https://blog.trailofbits.com/2026/02/18/carelessness-versus-craftsmanship-in-cryptography/
35•ingve•3d ago•6 comments

How I launched 3 consoles and found true love at Babbage's store no. 9 (2013)

https://arstechnica.com/gadgets/2013/01/how-i-launched-3-consoles-and-found-true-love-at-babbages...
19•zepearl•2d ago•10 comments

Scientists discover recent tectonic activity on the moon

https://phys.org/news/2026-02-scientists-tectonic-moon.html
57•bookmtn•4d ago•3 comments

I verified my LinkedIn identity. Here's what I handed over

https://thelocalstack.eu/posts/linkedin-identity-verification-privacy/
1292•ColinWright•1d ago•440 comments

Canvas_ity: A tiny, single-header <canvas>-like 2D rasterizer for C++

https://github.com/a-e-k/canvas_ity
102•PaulHoule•16h ago•35 comments

A16z partner says that the theory that we’ll vibe code everything is wrong

https://www.aol.com/articles/a16z-partner-says-theory-well-050150534.html
147•paulpauper•1d ago•208 comments

Keep Android Open

https://f-droid.org/2026/02/20/twif.html
2093•LorenDB•1d ago•699 comments

The Human Root of Trust – public domain framework for agent accountability

https://humanrootoftrust.org/
19•3du4rd0v3g4•21h ago•7 comments

Inputlag.science – Repository of knowledge about input lag in gaming

https://inputlag.science
93•akyuu•15h ago•30 comments

Permacomputing

https://wiki.xxiivv.com/site/permacomputing.html
156•tosh•4d ago•38 comments

Don't create .gitkeep files, use .gitignore instead (2023)

https://adamj.eu/tech/2023/09/18/git-dont-create-gitkeep/
155•frou_dh•1d ago•86 comments
Open in hackernews

Show HN: Convert Large CSV/XLSX to JSON or XML in Browser

https://csvforge.com
41•Botlabs•9mo ago
Hello HN, I'm excited to share a project I've been working on: A simple, fast way to process huge CSV and XLSX files directly in your browser and export them as clean JSON or XML

Here's a few things that makes this converter different: - runs in the browser - all parsing and conversion is client side can handle data any size data - automatically detects delimiters, encodings, and data types as it parses - Live preview with column renaming, search/replace, and data cleanup - Export to JSON or XML — clean, structured output that can be used for API or Databases

backstory: I built this tool for myself. I work with massive CSV and TXT files, some over 10GB, and opening them in Excel would freeze my laptop, some of the online converters only limits to a certain size, so I started learning Python and pandas but ended up wasting so much time trying different delimiters or fixing badly structured data just to make it usable, and I thought this would be a really fun project to build

I'd love some feedback. Thank you

URL: https://csvforge.com

Comments

sverhagen•9mo ago
"Runs in the browser" and "client side" isn't as much of a selling point to me as it's made out to be. It's a claim that I can't really validate until it's too late. If it's a commercial service I'm going to have to pay for, then maybe you should go all the way in gaining my trust with whatever safeguards it takes, so that I no longer care if I upload my data to your server or not.
rustc•9mo ago
> then maybe you should go all the way in gaining my trust with whatever safeguards it takes

What kind of safeguards are possible with a web app?

sverhagen•9mo ago
I think this comes down to legally-enforceable contracts with some teeth. A lot of business seem okay to trust Google's cloud products, or Microsoft's? I think as private person with limited means for litigation, you're likely sol.
hahn-kev•9mo ago
Yeah I really wish there was a way for this to be enforced by the browser that the end user could trust. It would have to be a standard, but outside of opening dev tools and toggling offline mode there's no way to be sure.

The funny thing is that it feels safer to download a desktop app and give it the same data even though it's usually much harder to validate if it's shipping your data somewhere else.

strogonoff•9mo ago
There’s a cheap trick to make sure a website that claims to do everything client-side actually does everything client-side:

1. Open the site in an incognito window.

2. Turn off your Internet.

3. Do what you’ve got to do.

4. Close browser window.

As a bonus, and this makes it better than just flipping the offline switch in developer tools, if you turn off Internet in a way that keeps the browser thinking it’s online, you can also peek at whether any network requests are made (for pathological cases where the app does everything locally but phones home anyway).

Botlabs•9mo ago
Sure, but you can validate it dev tools exist for a reason. Honestly, I just can’t afford the storage costs if users are uploading 50GB+ CSVs. It’d be a huge strain on any server, not to mention painfully slow for users. Running everything client side was the easiest and most practical way to build this MVP at least for me thanks for the feedback
o11c•9mo ago
"Large" generally means "bigger than RAM"; 10GB is medium-sized these days since it fits in most people's RAM. Does the browser actually have the (web worker?) APIs needed to stream and "upload" and "download"?
shubhamjain•9mo ago
I don't get it. Are JSON and XML files more friendly to import vs CSV files? I always assumed CSVs were the standard. Any reasons to prefer structured formats?

Shameless plug: I am working on a similar problem of Excel not being a great tool for large datasets. My desktop app[1] lets you import raw data files and query them using SQL. (The website needs to be updated, the app looks much better than the current screenshots).

[1]: https://textquery.app

Botlabs•9mo ago
yes they are a lot easier to work with when inserting into the database
snappr021•9mo ago
This type of thing is fairly trivial to create with ChatGPT running entirely locally in HTML.

A couple of kb of open standard vanilla js that does some simple things faster than legacy spreadsheets etc ever could.

Even to the point of creating invoices, reports etc based on standard filters stored in local storage…

oschvr•9mo ago
Looks like you made it in lovable. It has that characteristic UI.

If so, how much time did it take you?

Botlabs•9mo ago
thanks for your comment, it took me almost 3 weeks to build this
constantcrying•9mo ago
I think it should go without saying, but never use this with anything more relevant than a hobby project.

Doing this with any kind of data you don't fully own (e.g. data from your company) is a terrible idea, from so many standpoints. That it is "allegedly" running locally is not making it much better.

I think my question to OP is, who is this for. Any developer can write up a convert for his own datasets, in basically any case I can think of where you are handling large amounts of data you are building a pipeline to do cleanup, renaming, conversion, etc. Who wants to have a part of that pipeline be uploading the data into the browser?