FormatOwl blog
Start with a real task. Find the right tool and get it done.
Colorize Black and White Photos: A Practical AI Guide
Learn how to colorize a photo locally in your browser, adjust color strength and export PNG. Understand AI color estimates, loading time and common problems.
Photo to Painting: Watercolor and Oil Painting Effects
Turn a photo into a painting in your browser. Compare watercolor and oil effects, adjust style strength, use a reference image and export a PNG.
Batch Convert and Resize Images Without Uploading Your Files
Convert a folder of JPG, PNG, WebP or AVIF images, keep proportions when resizing, review failures and download a ZIP from your browser.
How to Format a Large JSON File Without Pasting It into a Text Box
Open multi-megabyte JSON locally, separate syntax checks from schema validation, preserve numeric literals and export the complete formatted result.
Make a Scanned PDF Searchable and Organize the Result
Learn when a PDF needs OCR, review recognized text, suggest filenames and choose between original-file copies and searchable PDF exports.
Base64, URL Encoding and JWT Decoding: What Each Operation Means
Choose the right text decoder, avoid double encoding, and understand why decoding a JWT does not verify its claims.