Show HN: Presse – a Rust CLI tool to compress and merge PDFs https://ift.tt/x2LRVjW

Show HN: Presse – a Rust CLI tool to compress and merge PDFs Compression, merging and image conversion to PDF in one command-line tool. Benchmarked against ghostscript on the same corpus (~20 docs), compression was 7x faster, and 19% better compression (ghostscript even inflated some already-optimized docs). The compression route extracts images, then lossy-compress them. This yield most of the gains compared to bytes optimization and artifact collection. Presse uses lopdf and image crates. Understanding and handling multiple image color-spaces was the most confusing part for me, starting from almost zero knowledge about Rust (learning project!). CMYK images not yet supported, some malformed PDF don't get properly compressed as well. https://ift.tt/VJ9cLw6 August 8, 2026 at 07:37AM

Show HN: ContentIQ – Evaluate and optimize content quality before publishing https://ift.tt/FZQsa9G

Show HN: ContentIQ – Evaluate and optimize content quality before publishing https://ift.tt/WGYC5uP August 8, 2026 at 04:31AM

Show HN: GreatArrow.ai – Shared memory for Claude, ChatGPT, Gemini and Cursor https://ift.tt/j3wGdxJ

Show HN: GreatArrow.ai – Shared memory for Claude, ChatGPT, Gemini and Cursor https://ift.tt/PFfxmvL August 6, 2026 at 07:55PM

Show HN: Tmagnet – a terminal torrent client written in C https://ift.tt/bkOj1fA

Show HN: Tmagnet – a terminal torrent client written in C https://ift.tt/0ucIEgl August 6, 2026 at 06:50PM

Show HN: Sidebar – a private ESP32 intercom for five kids, no accounts https://ift.tt/4E7NH23

Show HN: Sidebar – a private ESP32 intercom for five kids, no accounts Hello all - Inspired by many who build/assemble for their daughters/sons, I took cue and assembled a two-way communication between my son and his friends. Nothing spectacular. Just basic stuff to talk. He is eleven and doesn't have a phone. I wanted him to talk to his friends without an account, a feed, or an algorithm in between, so I built five ESP32-S3 touchscreen units, one per kid. Tap a friend's name, their unit rings. Tap Everyone, they all ring. Each unit dials outbound to a relay I run, so no house opens a port. Audio is uncompressed 16 kHz PCM in 20 ms frames, AES-256-GCM with a fresh key per call, over UDP with an encrypted-WebSocket fallback. To be precise: encrypted to my relay, not end-to-end. No rooms, no recordings, no free-text contacts; the roster lives in a server-side allow-list. I'm a PM, engineer by degree but not by profession - let alone a firmware engineer. I assembled this with Claude as the engineering partner, which is why the write-up includes what went wrong: I shipped an OTA that boot-looped my son's board, and separately "diagnosed" a Cloudflare outage that didn't exist because I tested from the wrong vantage point. Echo is still unsolved. The enclosure was designed in FreeCAD by my son (11); the STLs are in the repo. It was a fun and exhilarating work for me and my son - like most of you would have experienced. Looking forward for your responses/feedback. https://ift.tt/gqCvZ5e August 7, 2026 at 12:31AM

Show HN: QWERTY MIDI – Isomorphic Layout MIDI Controller https://ift.tt/TCIDSsZ

Show HN: QWERTY MIDI – Isomorphic Layout MIDI Controller https://ift.tt/5GucEsj August 6, 2026 at 10:27PM

Show HN: S3mini v1 – Tiny and fast S3 client, no-deps, for Node, Bun, Cloudflare https://ift.tt/Jzfimba

Show HN: S3mini v1 – Tiny and fast S3 client, no-deps, for Node, Bun, Cloudflare https://ift.tt/2pawLq7 August 6, 2026 at 05:02AM