Handy utilities for developers and writers. All tools run in your browser, require no signup, and are completely free to use.
Make classic memes (Drake, Distracted Boyfriend, and more) with no watermark, no signup, and no AI. Runs entirely in your browser.
Convert PNG, JPEG, GIF images to WebP format for 25-35% smaller file sizes and faster page loads.
Transform color photos to black and white using professional luminosity-based grayscale conversion.
Convert between standard Markdown and Slack mrkdwn format instantly. Supports bold, italic, links, code blocks, and more. Works in both directions.
Replace every em dash in ChatGPT, Claude, or Gemini output with a comma, period, colon, or hyphen. Also fixes curly quotes and invisible characters.
Turn markdown into a real .docx with Word headings, lists, tables, and code blocks. Download the file or copy and paste straight into Word.
Paste markdown or open an .md file and download a clean PDF with tables, code blocks, math, and clickable links. No watermark, nothing uploaded.
Paste AI output or a README into Google Docs with headings, tables, and checklists intact. Copy formatted text or download a .docx for Drive.
Render markdown as formatted text you can paste into any editor, CMS, or form that does not understand markdown. Copy as rich text or HTML.
Convert markdown into email-safe HTML with inline styles. Paste formatted text into Gmail, Outlook, or Apple Mail, or copy the HTML source.
Get markdown into Confluence with tables, code blocks, and headings preserved. Copy formatted text for Cloud, or wiki markup for Server and Data Center.
Convert markdown to Jira wiki markup for tickets, comments, the REST API, and automation rules. Handles tables, code blocks, and nested lists.
Save a ChatGPT answer as a PDF with typeset equations, tables, and code. Accepts the copy button or a selection and strips citation markers.
Export a ChatGPT answer to a .docx where LaTeX math becomes native, editable Word equations instead of raw code.
Paste formatted text from a web page, Google Docs, or Word, or paste raw HTML, and get clean GitHub Flavored Markdown back.
Convert a Word .docx file to clean markdown in your browser. Keeps headings, lists, tables, links, and code. The file is never uploaded.
Extract a PDF into structured markdown with headings, paragraphs, and lists, ready for ChatGPT, Claude, or your notes. Runs entirely in your browser.
Convert any public Twitter/X article or tweet to a downloadable PDF. Preserves formatting, images, and author information.
Read any QR code from an image or screenshot - URLs, Wi-Fi logins, contacts, and 2FA authenticator secrets. Decoded in your browser, nothing uploaded.
The image and text converters run entirely in your browser. Your files and text never touch a server, so there is nothing to leak, log, or sell. No accounts, no analytics on your inputs, no tracking.
No upload, no queue, no progress bar. Conversions complete in under a second because the work happens locally on your device. Drag, drop, done.
Every tool is free with no usage limits, no ads, no email harvesting, and no nag screens asking you to upgrade. Use them as much as you want.
Most online converters share an unfortunate pattern: you upload a file, sit through an ad, get throttled on file size, hit a daily quota, and end up creating an account just to download the result. These tools were built because that workflow is exhausting for something that should take a second.
The image tools, the PNG to WebP converter and the black and white image converter, use the HTML5 Canvas API to do all the pixel work client-side. Files never leave your device, which means there is no upload limit and no privacy concern. The Markdown ↔ Slack converter handles the formatting differences between standard Markdown and Slack's mrkdwn flavor in both directions, so you can paste docs into Slack or archive Slack messages into Notion or Obsidian without re-formatting by hand.
The Twitter/X to PDF converter is the one tool here that needs to fetch content on your behalf. It pulls the public tweet, formats it for print, and hands you a PDF. Useful for archiving threads before accounts disappear, citing tweets in research, or printing a long article for offline reading.
New tools are added when an existing workflow turns out to be unnecessarily painful. If there is a small utility you wish existed in this style (fast, private, free, no signup), let me know.
Yes. Every tool here is completely free with no sign-up, no account, no paywall, and no usage limit. They are built and maintained by Erik Sherman as a useful resource for developers and writers.
No. The image converters (WebP and Black & White) and every markdown, Word, PDF, and text converter run entirely in your browser using the HTML5 Canvas API and JavaScript, so your data never leaves your device. The Twitter/X to PDF tool fetches the public tweet on your behalf to generate the PDF, but does not store the result.
Most popular online tools require signups, show ads, throttle large files, or upload your data to their servers. These are deliberately the opposite: zero friction, zero tracking, zero upload. They were built for cases where you want a quick utility without thinking about it.
Yes. New tools are added when there is a real need that existing online tools handle poorly. Suggestions are welcome via the contact info on the homepage.
Yes. Every tool works on phones and tablets in any modern browser (Chrome, Safari, Firefox, Edge). Drag-and-drop falls back to tap-to-upload on touch devices.