Tools

← nicolaeandrei.com

Single HTML file browser tools, built with Claude Code and Codex during gym breaks and tram waits. Things may break — these are low-stakes experiments, not production software.

Tip: On iOS, tap Share → Add to Home Screen for an app-like experience.

Image & media

Document Scanner Scan documents with your phone camera. Drag corners to crop, apply filters, and download as PDF or image. Image ↔ SVG Converter Convert between raster images (PNG, JPG, WebP) and SVG. Runs entirely in the browser. Asset Resizer Resize images for app stores, browser extensions, YouTube, Steam, and more. Download individually or as ZIP.

Text & document

Sheet Converter Convert between XLSX, CSV, and ODS spreadsheet formats. Preview sheets before converting. DOCX → PDF Converter Convert DOCX files to PDF in the browser. Markdown → PDF Write or drop a .md file, preview with syntax highlighting, and export to PDF. Live editor with split preview. Paste Formatter Paste markdown or terminal output, get clean text for Slack, LinkedIn, or anywhere.

Data & health

Apple Health Explorer Analyze your Apple Health export with interactive charts. Track weight, steps, workouts, heart rate, and correlations. Fuel Log Plain text calorie and macro tracker. Type what you ate, get instant nutrition estimates with USDA lookup. Gym Tracker Log sets, reps, and weight. Track progress with charts, personal records, and deload week tagging. Baby Diaper Tracker Track pee and poo counts per day. Supports multiple babies, timestamped logs, and weekly summaries. Deload Calculator Calculate deload week sets, reps, and volume reduction. Enter your working prescription, get a deload recommendation.

Sumo

Sumo Day Companion Daily sumo tournament companion. Follow live basho with bout cards, win/loss tracking, and spoiler-free match reveals. Sumo Stats Look up any wrestler's career stats, basho results, and rank progression. Compare two rikishi side by side. Grand Sumo Calendar Downloadable ICS calendar for every honbasho. All six basho with dates, venues, and cities.

Travel & social

Wanderlog Travel guide aggregator. Auto-generated walking tours, curated research links for coffee, beer, and hidden gems. Fedi Media Extractor Extract all images and videos from any Bluesky or Mastodon profile. Browse in a gallery, copy URLs.

Developer

AI Agent Session Converter Convert coding agent sessions between Claude Code, Codex CLI, Cursor, Pi, and OpenCode.

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