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Top 23 JavaScript Converter Projects
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Numi is a text-based calculator that lets you type things like "25% of $400" or "3 hours 20 minutes in seconds" and just get the answer. It handles unit conversions, currency, time zones, and variables. Think of it as a scratchpad that does math.
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chai
chai - Experience Zero Trust security with Chai! Convert and view documents as vivid images right in your browser. No mandatory downloads, no hassle—just pure, joyful security! 🌈 (by DO-SAY-GO)
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save-file-converter
Converter for retro console save files to and from MiSTer, flash cartridges, Nintendo Switch Online, and save states from online emulation websites. Convert .srm to .sav and .sav to .srm. Convert files found around the Internet: All common formats for NES/SNES/GBA/N64/TG16/SMS/Genesis/Neo Geo/PS1 supported. Decrypt PSP saves.
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unicode-formatter
Convert portions of text to fancy text using unicode fonts for use on Twitter and other sites that don't support rich text
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3DGS-PLY-3DTiles-Converter
Convert Gaussian Splatting PLY files into 3D Tiles with adaptive LOD simplification and SPZ-compressed GLB output.
Project mention: 3D Gaussian Splatting Ply to 3D Tiles Converter | news.ycombinator.com | 2026-05-08 -
YNABGoingDutch
A converter between the CSV format of Dutch banks and the YNAB format. Or sync your bank statement directly with YNAB!
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FileToMarkdown
Convert 60+ file types to Markdown - Office docs, PDFs, code files, archives. CLI + API + Browser support.
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tibia-maps-script
:wrench: A command-line utility to convert between binary Tibia maps and human-readable forms of the map data.
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
JavaScript Converter discussion
JavaScript Converter related posts
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Show HN: LLMFeeder – Multi-tab web to Markdown for LLM context (v2.1.0)
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Show HN: OmniTools – Self-Hosted Open-Source Swiss Army Knife for Everyday Tasks
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X to Image: Turn X posts into shareable images
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I don't always use LaTeX, but when I do, I compile to HTML (2013)
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[Test Server] - Integer Overflow Bug or: How I turned my EK into a walking DP and hunted endlessly.
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Magic Web Explorer
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Ask HN: Is it just me, or could file conversion websites be a honeypot?
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A note from our sponsor - SaaSHub
www.saashub.com | 15 Jun 2026
Index
What are some of the best open-source Converter projects in JavaScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | showdown | 14,866 |
| 2 | ReLaXed | 11,789 |
| 3 | numi | 6,436 |
| 4 | decktape | 2,398 |
| 5 | node-html-to-text | 1,755 |
| 6 | synp | 788 |
| 7 | chai | 366 |
| 8 | save-file-converter | 228 |
| 9 | genshin-audio-extractor | 161 |
| 10 | TOML-to-Go | 150 |
| 11 | ducky2python | 138 |
| 12 | owmidiconverter | 134 |
| 13 | unicode-formatter | 87 |
| 14 | color-tools | 84 |
| 15 | x-image | 79 |
| 16 | zxtap-to-wav | 60 |
| 17 | 3DGS-PLY-3DTiles-Converter | 54 |
| 18 | YNABGoingDutch | 48 |
| 19 | townsclipper | 33 |
| 20 | FileToMarkdown | 26 |
| 21 | js-utils | 20 |
| 22 | tibia-maps-script | 17 |
| 23 | ejc-cli | 16 |
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