# Derweave: ASN.1 Explorer — DER trees and certificates

> DER trees and certificates (iPhone/iPad app by Robert Corbin.)

- Source: https://appshunter.io/ios/app/derweave-asn1-explorer/id6793302636 (this page in markdown: same URL + `.md`)
- Developer: [Robert Corbin](https://appshunter.io/developer/1890247992)
- Category: Developer Tools, Utilities
- Price: Free (on sale, was $2.99)
- Age rating: 4+
- Requires: iOS 17.0 · 73 MB
- Released: 2026-08-04
- Data updated: 2026-09-03
- User reviews in markdown: https://appshunter.io/ios/app/derweave-asn1-explorer/id6793302636/reviews.md

## What is Derweave?

Derweave: ASN.1 Explorer is a focused, fully on-device app. A private ASN.1 BER/DER explorer for tag-length-value trees, OIDs, X.509 certificates, CSRs, PKCS structures, extension bytes, hex ranges, and schema-assisted decoding.

KEY FEATURES
- Decode definite BER and canonical DER TLV trees
- Map common OIDs and X.509 fields
- Inspect certificates, CSRs, and PKCS containers
- Link every node to exact source-byte ranges
- Export annotated hex and structural JSON
- Complete bundled sample and local comparison workflow
- Local PDF report and Apple system share export
- Original offline technical reference library

ONE-TIME AND PRIVATE
- One paid download; no subscription or in-app purchase
- No account, advertising, analytics, tracking, or developer-operated backend
- Core features and bundled content work offline
- Work remains on device unless you deliberately share or export it through an Apple system interface

Inspection and learning aid. Trust, revocation, policy, identity, and cryptographic validity require an appropriate validation environment.


## Version history (last 1 release)

### 1.0 — 2026-08-04

No release notes.

## More apps by Robert Corbin

- [Daily Word Journey](https://appshunter.io/ios/app/daily-word-journey/id6761548266)
- [Hush Secret Text](https://appshunter.io/ios/app/hush-secret-text/id6761658175)
- [Renew Guard](https://appshunter.io/ios/app/renew-guard/id6761755447)
- [Receipt to PDF](https://appshunter.io/ios/app/receipt-to-pdf/id6761782025)
- [Route Your Pay](https://appshunter.io/ios/app/route-your-pay/id6761783719)
- [Tip Arbiter](https://appshunter.io/ios/app/tip-arbiter/id6761786879)

All apps by Robert Corbin: https://appshunter.io/developer/1890247992

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-03.*