Indie developer building privacy-first web tools. Maker of MoguanPDF - 33 PDF tools that run 100% in the browser.

github

zhengping sun • Peerlist

SizeCap compresses a video on iPhone or iPad to a file size you type. You enter a limit in MB, say an email or upload-form cap, and the app works back to a bitrate. After export it reads the file's real size. If the file is over, SizeCap re-encodes once with a corrected bitrate; if that still misses, it deletes the file and asks for a larger cap. If the clip is too long for the cap, it tells you the smallest size that would work.The default output is HEVC with two-pass encoding (one pass on hardware that can't do two). H.264 is there for older players. Presets fill in limits for email, Discord, WhatsApp and Teams.Compression runs on the device, and the app has no networking code of its own. One video at a time is free. SizeCap Pro, a one-time purchase, compresses up to 50 in one run.

SizeCap

Get timed captions, fix any word, pick a template, export. Transcription, editing and rendering run on your iPhone or iPad with Apple's on-device models. Works without an account, upload, subscription, or watermark. Free preview, then a one-time purchase.

CapScribe

AI Juhe (<a target="_blank" rel="noopener noreferrer nofollow ugc" class="break-all link-break text-gray-500 hover:underline" href="http://aijuhe.org">aijuhe.org</a>) is a Chinese-language directory of AI tools. It lists 475 tools in 15 categories, including chat assistants, image and video generation, code, document processing and translation. Each entry has a pricing label and a short write-up in Chinese and English. Most English directories skip the question users in mainland China ask first: can I open this from here? Every listed tool has a /can-i-use page. The 224 tools that are blocked also have an /alternatives page listing domestic substitutes. You do not need an account to browse. Signing in is only for upvoting a tool or saving it to favourites.

AI Juhe

LLM Abacus is a price table for large language model APIs. It covers 57 models from 16 vendors, including OpenAI, Anthropic, Google, xAI, DeepSeek, Zhipu, Moonshot, Alibaba, ByteDance, Baidu, Tencent and MiniMax, with input, output and cached-input prices side by side. Overseas vendors keep their USD list price and are converted through a single exchange-rate constant, so both currencies stay visible. Models priced by context length show every tier, and models with peak and off-peak pricing show both bands. An automated job re-checks prices every day against the vendors' own pages and flags anything that has drifted; the changelog has RSS and JSON feeds.Calculators: paste a prompt and get the token count and cost per model; a monthly bill calculator; a routing calculator that mixes a cheap model with a flagship one and shows what the split saves; a subscription versus API break-even for heavy Claude Code use; a local hardware versus cloud API break-even; an agent cost simulator for multi-turn context growth with prompt caching; and a use-case recommender that ranks models by cost and fit for a task. There is also an embedding model price table, a channel comparison of official prices against OpenRouter, Volcengine and Alibaba Bailian, a relay API checker that measures latency and the model a relay actually reports (your key never leaves the browser), a ratio converter for relay pricing, a price history timeline, and a live latency board with first-token latency and output speed, exportable as CSV.For programs there is a JSON price API and an MCP server. The site is Chinese-first with English pages, plus about two dozen explanatory articles.

LLM Abacus

Koutuxia removes the background from a photo and hands you a transparent PNG. The free path runs BiRefNet-lite in the browser: a 78 MB fp16 model downloaded once from a CDN and cached, then executed on WASM SIMD, dropping to a 39 MB model at a smaller input size on weaker hardware. An opt-in maximum quality mode swaps in a 191 MB Swin-Large backbone. You can touch up the cutout by hand with erase, restore and smart brushes, with undo. A paid cloud path gives finer edges, higher resolution and batch jobs.Around the cutout there is a set of image tools. One-click background swap to red, blue or white. A magic eraser: brush over a person or object and AI fills in the scene behind it. Unblur and restore for shaky, low-res or over-compressed photos, with a non-generative deconvolution mode that runs in the browser and an AI mode that rebuilds detail and restores faces separately. Repair text in a photo. Resize, compress and convert between JPG, PNG and WEBP without uploading. And an Image Studio that chains clean-up, cutout, background replacement, resize and export in one resumable workflow.The browser-side tools are free and need no signup; the AI modes draw on a Pro cloud quota. Pro is a one-time purchase or a subscription, paid with WeChat Pay, Alipay, card or PayPal. The site works from mainland China without a proxy, and there are iOS and HarmonyOS apps.

Koutuxia

IPOK checks an IP address and shows why it scored the way it did. It reads six live reputation sources (Scamalytics, proxycheck, AbuseIPDB, ipapi.is, StopForumSpam and ip-api) plus an offline database built from the Tor exit list, X4BNet's VPN ranges and the Spamhaus DROP list, and weights them instead of averaging. A datacenter address needs two specialist sources to agree before it gets flagged, so whole AWS or Hetzner ranges are not written off as proxies; a residential address needs only one. You also get the /24 neighbourhood score, ASN history with first-seen and last-seen dates, and a per-source breakdown of the final number. The methodology page explains the weights and the data sources page shows what each source contributed.Beyond the single lookup there is a batch lookup for IP lists and CIDR ranges with geo, ASN and a quick risk estimate, a side-by-side comparison of two addresses, a speed test with dual-source bandwidth and latency measured from several regions, and a free developer API for IP, BGP and reverse-IP queries. A short study on the site shows how six sources can vote six different ways on the same IP.No account and no paywall. There is a CLI you can run on a VPS over SSH so the check never passes through your browser or a proxy, a Chrome extension, and an iOS app on the App Store (https://apps.apple.com/us/app/ipok-ip-risk-leak-check/id6781751697). The site is in English and Chinese.

IPOK

MoguanPDF is a PDF toolkit that runs in the browser. The classic tools work entirely on your machine, on WebAssembly builds of qpdf and pdf-lib, and nothing is uploaded. Only the AI tools send extracted text to a language model, never the PDF itself.There are 33 tools. Page work: compress, merge, split, rotate, delete pages, reorder, crop, page numbers, watermarks, stamps, Bates numbering, remove blank pages, encrypt and unlock, sign by drawing or uploading a signature, and redact, which burns the area into pixels and rebuilds the page so text extraction finds nothing. Images: image to PDF, ID and document copies laid out on A4, print an image at an exact physical size, view and strip photo EXIF data, convert between image formats including HEIC, and PDF to images or to one long image. Conversion: PDF to Word with an optional AI re-flow, PDF tables to Excel, and OCR for Chinese and English that runs locally with tesseract.js. AI tools: PDF to Markdown, summaries, translation across seven languages, questions about the document, split with AI suggestions, batch renaming of invoice PDFs, and a WeChat article formatter for Markdown. AI tools have a small free daily quota.It installs as a PWA and the classic tools keep working offline. The classic tools need no login. The interface is in Chinese and English. There are also iOS, Android and HarmonyOS apps, and a mainland China edition at moguanpdf.cn.