Crates / asn1-rs / Alternatives
Rust crate alternatives · data Oct 24, 2026
Alternatives to asn1-rs
Short answerThe closest alternatives to asn1-rs on crates.io data are simple_asn1 (563K real downloads a day), url (2.5M real downloads a day), httparse (2.2M real downloads a day). Of the 8 we list, the most used is url, and 4 shipped a release in the last year. asn1-rs itself gets 601,623 a day with 29 dependents.
Every alternative we found
| Alternative | Real downloads a day | vs asn1-rs | Dependents | Last release | Why it is listed | |
|---|---|---|---|---|---|---|
| simple_asn1 Pulled in | 562,960 | 0.94x | 47 | 8mo | keyword "asn1", keyword "der" | compare |
| url Foundational | 2,520,673 | 4.19x | 16,906 | 10mo | category Parser implementations, keyword "parser" | compare |
| httparse Established | 2,183,298 | 3.63x | 609 | 20mo | category Parser implementations, keyword "parser" | compare |
| quick-xml Widely used | 1,525,182 | 2.54x | 2,687 | 2mo | category Parser implementations, keyword "parser" | compare |
| der Established | 1,514,408 | 2.52x | 378 | 49d | category Parser implementations, keyword "asn1" | compare |
| csv-core Pulled in | 687,418 | 1.14x | 32 | 12mo | category Parser implementations, keyword "parser" | compare |
| csv Widely used | 677,936 | 1.13x | 3,501 | 12mo | category Parser implementations, keyword "parser" | compare |
| anes Pulled in | 667,197 | 1.11x | 4 | 16mo | category Parser implementations, keyword "parser" | compare |
How to choose
- Same job, not the same API. Each line is listed because it shares a crates.io category or keyword with asn1-rs; read its description before you swap.
- More dependents means more answered questions and a smaller chance it disappears.
- Check the last release against how fast you need fixes. For asn1-rs: is it still maintained?
Rules
Alternatives = tracked crates (top 1000 by downloads) that share a specific crates.io category (2 points each) or keyword (3 points each) with asn1-rs, most similar first; its own parts (same name prefix) and crates it depends on or that depend on it are left out, because those are companions, not substitutes. Real downloads = quiet-day median, crates.io data Oct 24, 2026. Built when we find 3 or more.
Up next
The closest alternative: Few direct dependents and steady. 562,960 real downloads a day.simple_asn1Rust crate. A simple DER/ASN.1 encoding/decoding library. Real use: 563K downloads a day on quiet days; 47 crates depend on it.Read it next →Also worth your time