Show HN: I built a 20MB PDF editor using Flutter (vs 300MB industry standard) https://ift.tt/AWd09fY

Show HN: I built a 20MB PDF editor using Flutter (vs 300MB industry standard) https://ift.tt/lixtgB2 February 9, 2026 at 10:35PM

Show HN: PhoneClaw https://ift.tt/tKirRO5

Show HN: PhoneClaw Introducing PhoneClaw Inspired by @openclaw, it can entirely automate all android apps using simple language. Ships with: 1) Tiktok Video uploading agents 2) Instagram account creation agent (with 2Fa solving) 3) ClawScript, a JS scripting language that defines agentic actions like Magic Clicker. iOS version coming soon! Install it on a cheap $30 moto G play from walmart. https://ift.tt/l2XfDY5 February 9, 2026 at 09:17PM

Show HN: Printable Classics – Free printable classic books for hobby bookbinders https://ift.tt/Awmgvut

Show HN: Printable Classics – Free printable classic books for hobby bookbinders I created a site ( https://ift.tt/uTcW9eY ) that allows you to download classic books and customize things like the font size, page size, and the cover. As part of this, I wrote a software pipeline that takes epubs, html files, or pdfs and converts them into formatted books with custom covers, page numbers, chapter formatting, etc. I used an LLM for categorizing the books. There's a nice way to filter such that you could easily find "Young Adult, Ancient, Fantasy" for example. When downloading from the site, the PDFS are rendered in a work queue. Hopefully the server I'm using won't get overwhelmed. It takes around 10-15 seconds to generate for most books. Most of the books currently on the site are from Standard Ebooks. I plan to add more books from Archive.org and Project Gutenberg over time. I also created a little guide on how you can print and bind books at home with around $200 in equipment. ( https://ift.tt/xXkjzyW ) Printable versions of the Harvard Classics are available here: https://ift.tt/ye62DzC This is an example of direct PDF conversion. Hopefully this is useful to some people. I plan to use the books here for home education myself so it will at least be useful to me. I'd like to add a guide with top suggestions by age level and some educational theory on how I made the selections. I'm happy to take any feedback on the site or answer any questions. There is also the option to have the books professionally printed through a print on demand provider. I'm hoping that could be a way to pay for the site hosting. Thanks for checking it out! https://ift.tt/uTcW9eY February 9, 2026 at 02:09AM

Show HN: Minimal NIST/OWASP-compliant auth implementation for Cloudflare Workers https://ift.tt/QivNqKU

Show HN: Minimal NIST/OWASP-compliant auth implementation for Cloudflare Workers This is an educational reference implementation showing how to build reasonably secure, standards-compliant authentication from first principles on Cloudflare Workers. Stack: Hono, Turso (libSQL), PBKDF2-SHA384 + normalization + common-password checks, JWT access + refresh tokens with revocation support, HTTP-only SameSite cookies, device tracking. It's deliberately minimal — no OAuth, no passkeys, no magic links, no rate limiting — because the goal is clarity and auditability. I wrote it mainly to deeply understand edge-runtime auth constraints and to have a clean Apache-2.0 example that follows NIST SP 800-63B / SP 800-132 and OWASP guidance. For production I'd almost always reach for Better Auth instead ( https://ift.tt/502fJPb ) — this repo is not trying to compete with it. Live demo: https://private-landing.vhsdev.workers.dev/ Repo: https://ift.tt/I1WN7en Happy to answer questions about the crypto choices, the refresh token revocation pattern, Turso schema, constant-time comparison, unicode pitfalls, etc. https://ift.tt/I1WN7en February 9, 2026 at 01:30AM

Show HN: Algorithmically Finding the Longest Line of Sight on Earth https://ift.tt/fkEnvT6

Show HN: Algorithmically Finding the Longest Line of Sight on Earth We're Tom and Ryan and we teamed up to build an algorithm with Rust and SIMD to exhaustively search for the longest line of sight on the planet. We can confirm that a previously speculated view between Pik Dankova in Kyrgyzstan and the Hindu Kush in China is indeed the longest, at 530km. We go into all the details at https://alltheviews.world And there's an interactive map with over 1 billion longest lines, covering the whole world at https://map.alltheviews.world Just click on any point and it'll load its longest line of sight. Some of you may remember Tom's post[1] from a few months ago about how to efficiently pack visibility tiles for computing the entire planet. Well now it's done. The compute run itself took 100s of AMD Turin cores, 100s of GBs of RAM, a few TBs of disk and 2 days of constant runtime on multiple machines. If you are interested in the technical details, Ryan and I have written extensively about the algorithm and pipeline that got us here: * Tom's blog post: https://ift.tt/cMQaoN7 * Ryan's technical breakdown: https://ift.tt/SV2Ztvl This was a labor of love and we hope it inspires you both technically and naturally, to get you out seeing some of these vast views for yourselves! 1. https://ift.tt/Gv5bRgM https://alltheviews.world February 9, 2026 at 12:05AM

Show HN: Google Maps but for your repo (Open Source) https://ift.tt/43kOZr6

Show HN: Google Maps but for your repo (Open Source) Hi HN, I built Repomap, a tool that generates interactive architecture diagrams from any GitHub repository. It uses a Rust + tree-sitter engine to analyze the codebase and produces a D3-based graph UI with clustering, zoom/pan, and live progress updates https://ift.tt/X3cfYhI February 8, 2026 at 01:30AM

Show HN: Elysia JIT "Compiler", why it's one of the fastest JavaScript framework https://ift.tt/FS6L5fk

Show HN: Elysia JIT "Compiler", why it's one of the fastest JavaScript framework Wrote a thing or two about why Elysia is usually one of the top-performing JavaScript backend frameworks in performance games https://ift.tt/zCgxStH February 8, 2026 at 12:22AM