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Bleached corals thrive within days when touching healthy neighbour

https://www.nature.com/articles/d41586-026-03266-x
205•alkyon•22h ago•34 comments

Dam removals are bringing fish back across the northeastern United States

https://www.smithsonianmag.com/science-nature/dam-removals-are-bringing-fish-back-across-the-nort...
105•sohkamyung•22h ago•27 comments

Furifont, a Japanese font that shows furigana

https://furifont.antfu.me/
201•plaguna•2d ago•43 comments

The Commodore 64 hardware simulator: break chips and pins, see the results

https://github.com/antirez/c64-hw-simulator
106•antirez•2d ago•18 comments

Microsoft and CMU Team Up to Train Early Career Software Engineers

https://www.cs.cmu.edu/news/2026/microsoft-cmu-praise
34•azhenley•3h ago•33 comments

Making chicken transparent using Dorito dust

https://chillphysicsenjoyer.substack.com/p/making-chicken-transparent-using
227•crescit_eundo•8h ago•62 comments

DeepSeek-v4.1-Flash-1017

https://huggingface.co/deepseek-ai/DeepSeek-V4.1-Flash-1017
612•theykk•13h ago•535 comments

Pele – Mermaid diagrams as themeable SVG

https://pele.run/
131•dchest•6h ago•15 comments

Pattern Matching Beats Narrative Reasoning

https://blog.scottstevenson.net/p/pattern-matching-beats-narrative
30•tosh•3h ago•15 comments

Chrome and Edge are removing XSLT: what breaks and what does not

https://doctor-seo.net/en/blog/news/chrome-edge-removing-xslt/
46•croes•1h ago•43 comments

Gold is now the top U.S. export

https://www.numismaticnews.net/gold-now-top-u-s-export
148•iamnothere•4h ago•85 comments

Laser Fault Injection on a Budget: RP2350 Edition

https://courk.cc/rp2350-challenge-laser
27•gregsadetsky•2d ago•4 comments

Source code of the Estonian online voting system

https://github.com/valimised/ivxv
114•theanonymousone•18h ago•98 comments

Solar surpasses nuclear power globally for first time

https://www.pv-magazine.com/2026/09/29/solar-surpasses-nuclear-power-globally-for-first-time/
422•xbmcuser•8h ago•245 comments

Show HN: High-quality duck audio synthesizer

https://celphase.github.io/duck-pond/
55•celphase•8h ago•15 comments

Artie (YC S23) Is Hiring Enterprise AES and Senior Engineers

https://www.artie.com/careers
1•j-cheong•5h ago

OpenCode Hacked: User credentials leaked

https://twitter.com/opencode/status/2111516673953935833
546•pranshuchittora•4h ago•91 comments

You could have invented transformers from memory

https://alexwang.ai/posts/associative-memory/
462•speckx•1d ago•107 comments

Codex is EATING my Mac's disk space

https://github.com/openai/codex/issues/25921
27•AIorNot•4h ago•13 comments

Vintage Cassettes: 1963-2010

http://vintagecassettes.com/
36•austinallegro•3d ago•4 comments

Rendering pretty sky in Around The World game

https://frozenfractal.com/blog/2026/10/12/around-the-world-34-a-pretty-sky/
114•ibobev•1d ago•7 comments

Types of types: Haskell's Kind system

https://thunk.blog/posts/types-of-types-haskell-kind-system/
3•Thom2503•3d ago•1 comments

I Became a Citizen of Japan

https://www.derekwessman.com/blog-1/natural
94•luu•4h ago•29 comments

A skeptic's first contact with Kubernetes (2024)

https://blog.davidv.dev/posts/first-contact-with-k8s/
60•pmoriarty•18h ago•25 comments

Development statistics for the 7.2 kernel

https://lwn.net/Articles/1088776/
112•farlight•4h ago•90 comments

Show HN: Parin – A 2D game engine between raylib and Godot, written in Dlang

https://github.com/Kapendev/parin
31•Kapendev•1d ago•4 comments

Show HN: Esp32sim – Run ESP32 firmware in the browser

https://github.com/mikroverk/esp32sim
95•joakimeriksson•8h ago•11 comments

Show HN: Llmspeed – feel how fast a local LLM runs before you buy the hardware

https://llmspeed.dev/
226•albinstman•17h ago•75 comments

The future of programming (1982)

https://dl.acm.org/doi/10.1145/358453.358459
41•vismit2000•10h ago•9 comments

Show HN: Things to Do API

https://thingstodoapi.com/
26•invalidmonk•22h ago•16 comments
Open in hackernews

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

https://csvforge.com
41•Botlabs•1y 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•1y 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•1y 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•1y 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•1y 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•1y 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•1y 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•1y 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•1y 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•1y ago
yes they are a lot easier to work with when inserting into the database
snappr021•1y 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•1y ago
Looks like you made it in lovable. It has that characteristic UI.

If so, how much time did it take you?

Botlabs•1y ago
thanks for your comment, it took me almost 3 weeks to build this
constantcrying•1y 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?