Show HN: Secure private diffchecker with merge support

https://diffchecker.dev

17•subhash_k•2mo ago

Built a minimal diff checker with merge feature.

1. Supports 25K+ lines.

2. Character level instant diff.

3. Diff merge feature.

4. Share able links.

5. 100% secure, all diff computation happens in browser.

No other website offering high quality diff checker and merge feature with just browser only implementation.

Please review the website in detail and share feedback.

Comments

runningmike•2mo ago

Do you release the code as FOSS?

subhash_k•2mo ago

Unfortunately No. Planning to monetize through ads once UI is polished.

bramhaag•2mo ago

Why would releasing the code under a FOSS license prevent you from adding ads?

subhash_k•2mo ago

To be honest. Never really thought about it fully. I don't know monetization plan as well. I just wanted to create better private version of diff checker and merge. Will think through and update here.

KomoD•2mo ago

Not so secure and private then if you're planning to embed a bunch of ad tracking scripts...

subhash_k•2mo ago

The input data will not be passed on to any server which include ads as well. The input will not be persisted so no way the data is accessible other that the user.

This can be tested by disabling the internet and checking the diff.

jiehong•2mo ago

I’m still finding a local instance of Beyond Compare [0] unbeatable.

Especially its table compare feature [1].

[0]: https://www.scootersoftware.com/

[1]: https://www.scootersoftware.com/v4help/viewdata.html

subhash_k•2mo ago

Never had a need to do table comparison. Looks like customised csv diff comparison. Will look into and see if i can add it as feature or different page/tool.

jiehong•2mo ago

I needed it for diffing big csv files where the diff was complicated to understand, and limited to some columns out of 30+ columns.

Might be niche, though.

recursive•2mo ago

Some of the CSS is making the numbered steps start at 8 instead of 1. In particular

    ol { counter-reset: steps; }

subhash_k•2mo ago

Can you please share the link of diff? You can copy it from the website after input by clicking share as url button, so that it will easy for me to debug. Thanks for the feedback.

recursive•2mo ago

It's based on an inline stylesheet with thousands of rules. The compressed URL is... big.

thealistra•2mo ago

Bro no one will use a web service and trust it is 100% private. This is an unprovable claim. Maybe it is private now, but you sell this in 5 years and it stops being so.

Maybe a JavaScript ad jailbreaks an iframe and reads this.

There is no beating a locally running program

subhash_k•2mo ago

Agreed the feeling of pasting code to external website always feels insecure. But it doesn't mean locally running programs are safe either.

Atleast in website like this you can disable network access and work in offline mode and get the confident.

ninalanyon•2mo ago

How does this compare to existing offline solutions like Emacs Ediff, KDiff3, etc?

subhash_k•2mo ago

Given is this is a website you can access it easily without having a need to install. Mostly features will be more over same.

Digital Iris [video]

Essential CDN: The CDN that lets you do more than JavaScript

They Hijacked Our Tech [video]

Vouch

HRL Labs in Malibu laying off 1/3 of their workforce

Show HN: High-performance bidirectional list for React, React Native, and Vue

Show HN: I built a Mac screen recorder Recap.Studio

Ask HN: Codex 5.3 broke toolcalls? Opus 4.6 ignores instructions?

Vectors and HNSW for Dummies

Sanskrit AI beats CleanRL SOTA by 125%

'Washington Post' CEO resigns after going AWOL during job cuts

Claude Opus 4.6 Fast Mode: 2.5× faster, ~6× more expensive

TSMC to produce 3-nanometer chips in Japan

Quantization-Aware Distillation

List of Musical Genres

Show HN: Sknet.ai – AI agents debate on a forum, no humans posting

University of Waterloo Webring

Large tech companies don't need heroes

Backing up all the little things with a Pi5

Game of Trees (Got)

Human Systems Research Submolt

The Threads Algorithm Loves Rage Bait

Search NYC open data to find building health complaints and other issues

Michael Pollan Says Humanity Is About to Undergo a Revolutionary Change

Show HN: Grovia – Long-Range Greenhouse Monitoring System

Ask HN: The Coming Class War

Mind the GAAP Again

The Yardbirds, Dazed and Confused (1968)

Agent News Chat – AI agents talk to each other about the news

Do you have a mathematically attractive face?

Digital Iris [video]

Essential CDN: The CDN that lets you do more than JavaScript

They Hijacked Our Tech [video]

Vouch

HRL Labs in Malibu laying off 1/3 of their workforce

Show HN: High-performance bidirectional list for React, React Native, and Vue

Show HN: I built a Mac screen recorder Recap.Studio

Ask HN: Codex 5.3 broke toolcalls? Opus 4.6 ignores instructions?

Vectors and HNSW for Dummies

Sanskrit AI beats CleanRL SOTA by 125%

'Washington Post' CEO resigns after going AWOL during job cuts

Claude Opus 4.6 Fast Mode: 2.5× faster, ~6× more expensive

TSMC to produce 3-nanometer chips in Japan

Quantization-Aware Distillation

List of Musical Genres

Show HN: Sknet.ai – AI agents debate on a forum, no humans posting

University of Waterloo Webring

Large tech companies don't need heroes

Backing up all the little things with a Pi5

Game of Trees (Got)

Human Systems Research Submolt

The Threads Algorithm Loves Rage Bait

Search NYC open data to find building health complaints and other issues

Michael Pollan Says Humanity Is About to Undergo a Revolutionary Change

Show HN: Grovia – Long-Range Greenhouse Monitoring System

Ask HN: The Coming Class War

Mind the GAAP Again

The Yardbirds, Dazed and Confused (1968)

Agent News Chat – AI agents talk to each other about the news

Do you have a mathematically attractive face?

Show HN: Secure private diffchecker with merge support

Comments