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wtf is ser?

changkun/ser — explained in plain English

Analysis updated 2026-07-30 · repo last pushed 2021-09-30

4GoAudience · developerComplexity · 2/5DormantSetup · easy

TL;DR

ser is a tiny command-line tool that instantly turns any folder into a local web server, letting you share files or preview websites with one command. Built with Go, it requires no dependencies.

Mindmap

mindmap
  root((repo))
    What it does
      Serves folder as web server
      Single command in terminal
      Preview sites in browser
      Share files over network
    Tech stack
      Go
      Single executable
      No external dependencies
    Use cases
      Web dev site preview
      Share files in meetings
      Transfer to phone
    Audience
      Web developers
      Non-technical users
    Setup
      Type ser in terminal
      Defaults to localhost 8080
      Customizable with flags

Code map

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Why would anyone build with this?

REASON 1

Preview a static website you are building by serving its folder and opening it in your browser.

REASON 2

Share a folder of PDFs or images with colleagues on the same Wi-Fi during a meeting.

REASON 3

Download files from your desktop to your phone without a cable or cloud service.

What's in the stack?

Go

How it stacks up

changkun/seraeneasr/github-trendsbxcodec/go-simple-flatbuffer
Stars444
LanguageGoGoGo
Last pushed2021-09-302020-12-182017-06-09
MaintenanceDormantDormantDormant
Setup difficultyeasyeasyeasy
Complexity2/52/52/5
Audiencedeveloperpm founderdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · easy Time to first run · 5min

Requires installing the Go toolchain to build from source, but the resulting binary has no runtime dependencies.

Wtf does this do

ser is a lightweight tool that lets you instantly turn any folder on your computer into a mini web server. If you've ever needed to quickly share files with someone on your network, or preview a website you're building, this tool makes it happen with a single command. It's designed as a faster, simpler replacement for a common Python command that does the same thing. Here's how it works: you open your terminal, navigate to the folder you want to share, and type ser. The program starts a local web server that hosts the contents of that folder. By default, it serves the current directory at localhost:8080, meaning you can open your browser and see the files immediately. You can also easily customize it with simple flags, if you want a different port, you just add -p 8088, or if you want to serve a different folder, you just pass the directory path. You can also expose it to your broader network by specifying a different address. This is useful for a few different scenarios. A web developer building a static site can use it to quickly see how their HTML and CSS look in a browser. If you're in a meeting and want to quickly share a folder of PDFs or images with colleagues on the same Wi-Fi, you can serve the directory and give them a URL. It's also handy for downloading files from your desktop to your phone without needing a cable or cloud service. The project is built with Go, which makes it a single, fast executable file with no external dependencies. Unlike the Python alternative it replaces, you don't need a specific programming language environment installed to run it.

Yoink these prompts

Prompt 1
I have ser installed. Write a command to serve the folder ~/projects/my-site on port 3000 so I can preview it in my browser.
Prompt 2
Help me use ser to share a folder of images with colleagues on my local Wi-Fi network. What command and address should I give them?
Prompt 3
I want to replace my usual `python3 -m http.server` workflow with ser. Show me the equivalent ser command and explain how to customize the port and directory.

Frequently asked questions

wtf is ser?

ser is a tiny command-line tool that instantly turns any folder into a local web server, letting you share files or preview websites with one command. Built with Go, it requires no dependencies.

What language is ser written in?

Mainly Go. The stack also includes Go.

Is ser actively maintained?

Dormant — no commits in 2+ years (last push 2021-09-30).

How hard is ser to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is ser for?

Mainly developer.

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