Best Code Transpilers in 2026
Updated
In short: SWC is ranked #1 of 28 as of 3 October 2026, ahead of Transcrypt and Babel. The best-ranked option with a free plan is Transcrypt.
Moving code between languages or syntax versions calls for a close look at what goes in and what comes out. Compared on source and target languages, syntax-version conversion, and conversion mode, these tools also vary in intermediate output and access through an API or CLI. Free-plan availability and the paid-from point offer additional context. SWC and Babel head the ranking, followed by Kotlin/JS and Cython; Google Web Toolkit is also among the first entries. Match the listed conversion capabilities and access options to the languages and workflow you have in mind.
28 code transpilers ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 SWC Android only RecognisedPhone appDocumentedFree plan 7.9Free
- 2 Transcrypt No phone app RecognisedPhone appDocumentedFree plan 6.4Free Syntax-version conversion: No
- 3 Babel No phone app RecognisedPhone appDocumentedFree plan 6.3Free Syntax-version conversion: Yes
- 4 ClojureScript No phone app RecognisedPhone appDocumentedFree plan 6.3Free
- 5 Cython No phone app RecognisedPhone appDocumentedFree plan 6.3Free Syntax-version conversion: No
- 6 Google Web Toolkit No phone app RecognisedPhone appDocumentedFree plan 6.3Free
- 7 Kotlin/JS No phone app RecognisedPhone appDocumentedFree plan 6.3Free Syntax-version conversion: Yes
- 8 Vala No phone app RecognisedPhone appDocumentedFree plan 6.3Free
- 9 CoffeeScript No phone app RecognisedPhone appDocumentedFree plan 5.9 Syntax-version conversion: Yes
- 10 Dart pub No phone app RecognisedPhone appDocumentedFree plan 5.7
- 11 Haxelib No phone app RecognisedPhone appDocumentedFree plan 5.4
- 12 J2ObjC No phone app RecognisedPhone appDocumentedFree plan 5.4 Source languages: 1 languagesTarget languages: 1 languagesSyntax-version conversion: No
- 13 Kalai No phone app RecognisedPhone appDocumentedFree plan 5.4 Target languages: 3 languagesSyntax-version conversion: No
- 14 SourceMeld No phone app RecognisedPhone appDocumentedFree plan 5.4 Source languages: 8 languagesTarget languages: 8 languagesSyntax-version conversion: No
- 15 Brython No phone app RecognisedPhone appDocumentedFree plan 5.3 Syntax-version conversion: No
- 16 CodeTransEngine No phone app RecognisedPhone appDocumentedFree plan 5.3 Syntax-version conversion: No
- 17 Mitosis No phone app RecognisedPhone appDocumentedFree plan 5.3 Syntax-version conversion: No
- 18 Fable No phone app RecognisedPhone appDocumentedFree plan 5.2 Source languages: 1 languagesTarget languages: 7 languages
- 19 js_of_ocaml No phone app RecognisedPhone appDocumentedFree plan 5.2 Syntax-version conversion: No
- 20 JSweet No phone app RecognisedPhone appDocumentedFree plan 5.2 Syntax-version conversion: Yes
- 21 Opal No phone app RecognisedPhone appDocumentedFree plan 5.2
- 22 ReScript No phone app RecognisedPhone appDocumentedFree plan 5.2
- 23 Scala.js No phone app RecognisedPhone appDocumentedFree plan 5.2
- 24 Skulpt No phone app RecognisedPhone appDocumentedFree plan 5.2
- 25 TeaVM No phone app RecognisedPhone appDocumentedFree plan 5.2
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which code transpiler is ranked first on Samsung Mobile US Press?
SWC is ranked #1 of 28 with a score of 7.9. Transcrypt is second and Babel third.
How many of these have a free plan?
8 of the 25 on this page publish a free plan on their own pricing pages.
How is this list ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.