@evanmercerdev

Evan Mercer

@evanmercerdevJoined August 2026

Indie maker building Twitter Viewer in my spare time.

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Evan Mercer's blogs

Evan Mercer's Blogevanmercer.hashnode.dev5 posts

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EMEvan Mercerevanmercer.hashnode.devSep 29 · 4 min read

Checking a Downloaded Video's Real Resolution and Orientation with ffprobe

When you save a clip from social media, the label you picked ("720p", "HD", "1080×1920") and the file you get don't always match what a player shows. ffprobe tells you the truth in one command: the st

EMEvan Mercerevanmercer.hashnode.devSep 23 · 4 min read

Same problem, different platform: what carried over from an X viewer to a TikTok story viewer

A while ago I built Twitter Viewer, a small free tool for reading public X profiles and posts without logging in. Later I noticed the same pattern on TikTok: someone sends a link, the recipient doesn'

EMEvan Mercerevanmercer.hashnode.devSep 21 · 5 min read

Designing around content that expires: three decisions from building a TikTok story viewer

Most of the small tools I build deal with content that sits still. A tweet from 2019 is the same tweet today. A TikTok story is not like that: it is gone 24 hours after it was posted, and nothing brin

EMEvan Mercerevanmercer.hashnode.devSep 17 · 3 min read

The states nobody designs for in a "paste a link, get a file" tool

A "paste a link, get a file" tool looks trivial from the outside — one input, one button, one result. I've found the opposite is true: the harder a tool is to describe, the more the UX rides entirely

EMEvan Mercerevanmercer.hashnode.devAug 14 · 7 min read

After Nitter: what's left of third-party X front-ends

If you go looking for a working Nitter instance today, you get a confusing answer. Some are gone. Some show you a bot check. A couple work perfectly well. And the flagship instance returns HTTP 200 wi

Evan Mercer

About

Available for

Evan Mercer's blogs

Recently published

Checking a Downloaded Video's Real Resolution and Orientation with ffprobe

Same problem, different platform: what carried over from an X viewer to a TikTok story viewer

Designing around content that expires: three decisions from building a TikTok story viewer

The states nobody designs for in a "paste a link, get a file" tool

After Nitter: what's left of third-party X front-ends

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Evan Mercer

About

Available for

Evan Mercer's blogs

Recently published

Checking a Downloaded Video's Real Resolution and Orientation with ffprobe

Same problem, different platform: what carried over from an X viewer to a TikTok story viewer

Designing around content that expires: three decisions from building a TikTok story viewer

The states nobody designs for in a "paste a link, get a file" tool

After Nitter: what's left of third-party X front-ends