Tools starting with F

Build FAQPage JSON-LD from your questions and answers, ready to paste into a page.

Generate every favicon size from one image, including favicon.ico and the head snippet.

Decrypt a file encrypted here, using the password it was encrypted with.

Encrypt any file with AES-256-GCM and a password, entirely in your browser.

Hash any file with SHA-1, SHA-256, SHA-384 and SHA-512, and compare against a published checksum.

Produce a list of chosen files with sizes and dates as text, CSV, Markdown or JSON.

Plan a batch rename with find and replace, numbering and case rules, then take the script or the renamed copies.

Convert between bytes, KB, MB, GB and TB in both binary and decimal, with transfer times.

Make filenames safe across operating systems, and see exactly what was wrong with them.

Work out the exam mark you need to reach a target grade for the course.

Replace text across a whole document, with whole-word, case and regex options.

Work out force from mass and acceleration, or weight from mass under gravity, in newtons and pounds-force.

Convert between newtons, kilonewtons, pound-force and kilogram-force.

Add, subtract, multiply or divide two fractions and simplify the result.

Convert between hertz, kilohertz, megahertz, gigahertz, rpm and beats per minute.

Estimate the fuel cost of a journey from distance, economy and fuel price.

Convert between MPG (US), MPG (UK), L/100 km and km/L. Compare fuel economy figures from different countries with the correct conversion.