Alternatives

Products that do what Base64 Buddy does

Encode, decode, preview & download Base64 files offline

1. 1
   B64▲148

   A URL redirection service powered by vanilla JavaScript

   2018

2. 2PA
   Polar – an offline web browser with annotations and tagging▲382

   2018 · getpolarized.io

3. 3
   Sidekick▲263

   Like Chrome DevTools for your backend, now open source

   2022

4. 4
   Private Base64 Decoder▲2

   Private Base64 in Your Browser

   Jun 2026 · base64decode.ai

5. 5
   POLAR▲81

   An offline browser for for web, pdf, books, and annotations.

   2018

6. 6
   github-plus▲156

   Chrome Extension to display file size, download & copy link

   2016

7. 7
   Claude Folder Upload▲150

   Effortlessly upload entire codebases to Claude Projects

   2024

8. 8
   Offline File Converter▲8

   Convert files in your browser, nothing is uploaded, ever.

   Jul 2026 · offlinefileconverter.com

9. 9
   encodeB64▲6

   Fast, private Base64 encoder for text, files & images

   Jun 2026 · encodeb64.com

10. 10
    Weje Web Clipper for Google Chrome▲107

    Free Chrome extension to save anything to online whiteboards

    2022

11. 11
    Open Claude in Chrome▲121

    Claude in Chrome, reverse-engineered, Jailbroken

    Apr 2026 · github.com

12. 12
    Base64 Decoder & Encoder Online — Free▲3

    Free Base64 decoder that never uploads your data

    Jun 2026 · decode64.com

13. 13
    Base64 encoder & decoder ▲7

    Base64 encoder & decoder - Ease Tools

    Dec 2025

14. 14
    Free Base64 Encoder Decoder Online Tool▲1

    Free Base64 Encoder Decoder – Encode & Decode Data Instantly

    25d ago · technofirstonline.com

15. 15
    Base64 Converter▲2

    Fast, Secure & Free Base64 Conversions.

    Jun 2026 · base64converters.com

16. 166S
    64.surf – share files using only the URL▲16

    Hey HN, I built this to scratch an itch I had around what can be done solely using the URL. It's very minimal with no storage involved, and your files can even be encrypted. The only caveat is some platforms wont allow you to post long links. I thought about using a URL shortener, but storing and mapping URLs kind of defeats the purpose. However most browsers do allow you to open them once you have them. For instance I was able to "share" a 10MB file using safari, however 350KB seems to be the max for Chrome.

    2024 · 64.surf

17. 17
    Softorino Online Converter▲52

    Free & Safe online file converter. No ads. No bs.

    8d ago · convert.softorino.com

18. 18CB
    "crzy64", base64 mod aimed for fastest decoding▲47

    2021 · github.com

19. 19EB
    Encode Base64▲5

    2025 · encodebase64.io

20. 20
    Offline PDF Tools▲5

    Private PDF tools that work 100% offline in your browser

    Jun 2026 · chromewebstore.google.com

21. 21
    PeerServ.sbs▲7

    Fast, Private, Browser-Based Tools

    Jun 2026

22. 22
    Dev Toolbelt▲3

    4 dev tools in one Chrome popup. JSON, Regex, Base64, Color.

    Jul 2026 · chromewebstore.google.com

23. 23SA
    Sidekick, an open source Claude Code alternative▲25

    2025 · github.com

24. 24CS
    Client-side ads-free dev utils (diffs, time conversion, JSON formatter)▲10

    utils.foo a fully client side, ads-free developer utils app. Today, it has a timestamp converter, base64/url encoder/decoder, json & diff utils, quick pivoting data. A lot of these exist, but often buried with ads or unclear data usage. I wanted to build something for myself that is ads-free and easy to use. My goal is get to top 20 commonly used tools, make them feature-rich and then reduce the page size. Will appreciate feature/tools requests and feedback at https://github.com/midplane/forum.utils.foo/issues.

    2024 · utils.foo

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