File & Misc
ZIP files, convert audio, process spreadsheets, and more utilities.
This category exists for the utilities that don't cleanly belong in a more specific one — zipping files, converting audio formats, processing spreadsheets — but are still genuinely useful, single-purpose tools worth having without hunting for a separate app for each.
ZIP / UnZIP Files
Compress and extract ZIP archives in browser
JSON and CSV Converter
Turn JSON into a CSV table for Excel or Sheets, or CSV back into JSON, with nested fields handled
Mail Merge to PDF
Turn a CSV or pasted table and a template into one letter, certificate or notice per row, as one PDF or a ZIP of PDFs.
Excel / CSV Converter
Convert between Excel and CSV formats
Meme Generator
Create memes with custom text and images
OCR (Image to Text)
Extract text from images using OCR
File Size Converter
Convert between file size units
YouTube Thumbnail Downloader
Download YouTube video thumbnails
EPUB Checker
Check an .epub in your browser for structure, metadata, navigation, missing files, alt text, cover and accessibility problems.
EPUB Maker
Turn .docx, .md and .txt chapters into a finished EPUB 3 e-book with cover, details and a reading preview.
ONIX Metadata Generator
Fill in a book metadata form and get a checked ONIX 3.0 XML file with ISBN-13 validation, prices, subjects and a live preview.