Ever searched the Bible for a concept you couldn't quite put into words? Biblos uses semantic search to help you find passages by meaning, not just keywords — so a search like "how to deal with anxiety" surfaces relevant verses even if the word "anxious" never appears.^1
Built by developer Jon Boldt, Biblos runs on BGE-large-en-v1.5 embeddings — a 1024-dimensional, 335M-parameter model that pre-computes vectors for every verse in the Bible. Type a concept or question, and it ranks passages by semantic similarity, with optional AI summarization grounded in the retrieved text.^1
The hybrid reference loader handles direct lookups too: type "John 3:16" or "Psalm 23" and the passage loads instantly. For New Testament verses, you can view the original Greek alongside definitions from the Dodson Greek Lexicon, plus commentary from 15+ Church Fathers (Augustine, Chrysostom, and others) for historical theological context.^2
A companion reading plan at biblos.app/daily now offers two paths through Scripture: a classic 5-day-per-week plan covering the whole Bible in 260 readings, and a new Blue Letter Chronological Bible Year plan — 365 daily readings in historical order, adapted from Blue Letter Bible's reading program with built-in ESV audio narration.^3
Why Christians Love It"Playing with this a bit more, and it is very cool! One thing I like is that it provides the source text, so you can verify whether the summary is accurate." — Hacker News user^4
"Bible study just got more lit." — Hacker News user^4
"Impressive. It actually gave useful results and summary for annihilationism." — Hacker News user^4
Notable- Free, no ads, no tracking, no sign-up required^1
- Open source on GitHub (CC BY-NC 4.0) with an active contributor community^2
- Featured on Hacker News "Show HN" with enthusiastic technical discussion^4
- Created by developer Jon Boldt as a free Bible study tool; also maintains a daily reading plan at biblos.app/daily^1
- Uses BGE-large-en-v1.5 embeddings with Greek lexicon and Church Fathers commentary integration^2
- Two reading plans available: 5-day/week (260 readings) and Blue Letter Chronological (365 days)^3
