Sam’s tiny apps
Inspired by similar tiny apps from Jeremy Howard and Simon Willison, I’ve created a few tiny HTML/JS-based apps that I find useful. I hope you find them useful too! These tiny apps are primarily made using Claude, ChatGPT, and Github Copilot.
tiny apps
- QR code generator - Generate QR codes from text or URLs.
- Text case converter - Convert text to various cases like uppercase, lowercase, camelCase, etc.
- Color picker - Pick and display colors in different formats (Hex, RGB, HSL).
- Html to markdown converter - Convert HTML content to Markdown format - inspired by Jeremy Howard’s web2md tool and recreated
- Word counter - Count words, characters, sentences, and more in your text.
- Markdown to R script - Convert Markdown text to R script comments.
- Markdown preview - Preview Markdown text as HTML.
- Clipboard format viewer - View different formats of clipboard content - taken from Simonw and slighly modified
- Writing style analyzer - Analyze text for weasel words, passive voice, and duplicate words - taken from Simonw and slighly modified
- Plain text copier - Copy plain text from formatted text.
- EXIF data viewer - View EXIF data from images.
- Rich text extractor - Extract and convert rich text to HTML, Markdown, or plain text.
- Real time HTML editor - Edit HTML in real-time with a live preview.
- Encrypt message - Encrypt and decrypt messages with a passphrase - inspired by Simon Willison’s blog post where he built a similar tool and recreated
- JSON viewer - View and format JSON data.
- Browser fingerprint - View detailed information about your browser and device.
- Scheduling tool - Enter and visualize availability for scheduling.
- Days to birthday tracker - Track days until upcoming birthdays.
- Days to event tracker - Track days until upcoming events.
- Extract URLs - Extract URLs from pasted content - inspired by Simon Willison who built a similar tool and recreated
- Image saver - Save one or more images from clipboard to your device.
- Cron expression generator - Create cron schedule expressions. Inspired by crontab guru website.
- Extract images - Extract images from pasted content.
- Multi-URL iframe dashboard - Create a dashboard with multiple URLs in iframes.
- Image resizer - Resize images to a specific width and height.
- HEIC image converter - Convert HEIC images to other image formats like JPG, PNG, and WEBP.
- Encrypt image - Encrypt and decrypt images with a passphrase - inspired by my similar Encrypt message tool. Note that image files are sometimes too large to encrypt into a URL and may take a while to encrypt/decrypt. These encrypted URLs can get pretty long and may not work in some browsers. This was just an experiment to see if it could be done.
- Clipboard manager - Manage and view your clipboard pastes by storing them in local storage on this webpage.
- Hiking time - Calculate hiking time based on Naismith’s Rule.
- mmwr2md - Convert CDC MMWR webpages to markdown format.
- Weekly availability - Enter and visualize weekly availability for scheduling.
- Checklist filters - Filter checklist items in markdown format.
- Reminders - Simple reminders app that stores reminders in local storage. Option to convert to tasks in markdown format and import/export reminders as Markdown.
- Bookmark bundle manager - Manage and view bookmark bundles in HTML format.
- Rd to HTML converter - Convert R documentation (Rd) format to HTML with a simple UI for rendering and sharing purposes.
- Label HEIC images - Add text labels or watermarks to HEIC images before converting them to other formats like JPG, PNG, and WEBP.
- URL Parameter editor - View and edit URL query parameters easily with a simple UI based on a URL.
- Gujarati writing practice - Generate customizable, print-ready practice sheets for Gujarati letters with optional romanization, configurable layouts, and PNG/PDF export.
- Twitter Advanced Search Builder - Generate advanced X (Twitter) search URLs using a simple form interface.
- Plain Text Clipboard Cleaner
Paste text and automatically copy a plain text version with all formatting removed.
tiny apps (external repos)
- Meeting Window - Find overlapping business hours between two or more cities worldwide. Supports multi-city comparison, shareable links, and PNG export.
By Sam Parmar (Github repo is here)
