All Tools (890) · Page 11 of 19
Search and filter through every Markvibe tool — 35 categories, 890 utilities, zero sign-ups.
Explain any HTTP status code in plain English.
Find the MIME type for any file extension.
Build a Gravatar avatar URL from an email.
Generate placeholder image URLs at any size.
Explain a regex pattern token by token.
Generate an HMAC signature with SHA-256.
Generate an HMAC signature with SHA-1.
Generate SHA-384 hashes for any text.
Generate the CRC-32 checksum of any text.
Generate the Adler-32 checksum of any text.
Build otpauth:// URIs for authenticator apps.
Generate a fresh Base32 TOTP secret.
Generate a cryptographically random 256-bit secret.
Estimate bit-entropy of any password in real time.
Compare two passwords for similarity.
Generate prefixed random API keys.
Generate random hex keys of any byte length.
Check whether a PIN is weak or sequential.
Project the future cost of money given inflation.
Forecast your retirement balance.
Compute return on investment.
Compute net present value of cash flows.
Compute profit and gross margin %.
Find units needed to break even.
Compute investment payback period in years.
Compute the future value of an investment.
Compute the present value of a future amount.
Convert annual salary into an hourly rate.
Project an hourly rate into annual salary.
Compute the freelance hourly rate you need.
Compute transfer time for a file size at a speed.
Estimate download time for any file at any speed.
Recommend bitrate for a given resolution and FPS.
Compute PCM audio bitrate from sample rate.
Compute DPI from screen resolution and size.
Compute megapixels from width × height.
Convert bytes to KB, MB, GB, TB.
Compute hosts and netmask for any CIDR.
Convert CIDR /n notation to a dotted netmask.
Convert a dotted netmask back to CIDR notation.
Convert an IPv4 address to dotted-binary.
Convert a dotted-binary string back to IPv4.
Convert between bps, Kbps, Mbps, Gbps, Tbps.
Convert FPS and seconds to frame counts and ms.
Live view of your viewport and DPR.
Compute PPI of any display.
Look up what a file extension means.
Compute packet loss percentage.