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Show HN: Open source JavaScript library to record and replay the web

Screenshot of www.rrweb.io captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 3 calendar years, with breakout response in 2 of them.

submissions
5
submitters
4
observed span
2018–2024
peak thread · 51 comments
353 pts
latest 20+ return · 2024-07-22
177 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

Hi, hackers, the author here. Since I've seen some people are talking about the open source idea and comparing rrweb to some commercial products, I'd like to share a blog post about the vision of rrweb. http://www.myriptide.com/rrweb-introduction/ Also, you will know about how rrweb works in this post.

yz-yu·353-point thread·

Anyone used replay.io and can compare both? Any limitations? This one is open source but there was no release in 2 years. edit: actually they release frequently it's just latest builds are still pre-release.

pzo·177-point thread·

It's very useful to me. Cool!

I've talked to a bunch of startups that are using rrweb behind the scenes - onboarding, product feedback, etc all need some variant of this functionality.

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
2

100+ points or 50+ comments

Total points
551

reference only — not used in Hall rules or ranking

Total comments
90

reference only — not used in Hall rules or ranking

Every submission

DateTitle as submittedByPointsComments
2018-12-28Show HN: Open source JavaScript library to record and replay the webFirst breakout · Best threadyz-yu35351
2021-06-25Rrweb: Open-Source Web Session Replay Librarysciurus10
2021-07-06Show HN: Rrweb 1.0 record and replay the web even betteryz-yu154
2021-07-06Rrweb.io – open-source web session replay librarysonograph52
2024-07-22Rrweb – record and replay debugger for the webHall induction · Latest 20+ point returnnotpushkin17733