File Inspection & Checksums
Inspect local files, calculate checksums and analyze binary/text characteristics in your browser. 25 tools are currently live in this section.
File Size Analyzer
Show exact bytes and human-readable size for a local file.
Open tool →File MIME Type Checker
Report the browser-provided MIME type and filename extension.
Open tool →File Signature Detector
Identify common file formats from magic bytes at the start of a local file.
Open tool →Adler-32 File Checksum
Calculate an Adler-32 checksum for a local file.
Open tool →FNV-1a 32-bit File Hash
Calculate the FNV-1a 32-bit hash of a local file.
Open tool →BSD Sum File Checksum
Calculate the classic BSD 16-bit rotating checksum for a local file.
Open tool →System V Sum File Checksum
Calculate the classic System V 16-bit checksum for a local file.
Open tool →CRC32 File Checksum
Calculate a CRC32 checksum for a local file.
Open tool →File Entropy Analyzer
Estimate Shannon entropy in bits per byte from local file bytes.
Open tool →File Byte Frequency Report
List the most frequent byte values in a local file.
Open tool →Printable Byte Ratio
Measure the percentage of ASCII printable/whitespace bytes in a file.
Open tool →NUL Byte Counter
Count zero bytes in a local file.
Open tool →File Hex Preview
Display the first bytes of a file as hexadecimal values.
Open tool →File Base64 Preview
Encode the beginning of a local file as Base64 for inspection.
Open tool →UTF-8 File Validator
Check whether a local file is valid UTF-8 using a strict decoder.
Open tool →File BOM Detector
Detect UTF-8, UTF-16 and UTF-32 byte-order marks.
Open tool →Line Ending Detector
Count CRLF, lone LF and lone CR line endings in a local text file.
Open tool →Text or Binary File Classifier
Classify a file using NUL bytes, UTF-8 validity and printable-byte ratio.
Open tool →Image Dimension Reader
Read width and height from a local image without uploading it.
Open tool →Image Aspect Ratio Reader
Calculate aspect ratio from a local image file.
Open tool →Audio Duration Reader
Read duration from a local browser-supported audio file.
Open tool →Video Duration Reader
Read duration from a local browser-supported video file.
Open tool →Video Resolution Reader
Read pixel dimensions from a local browser-supported video.
Open tool →Archive Format Detector
Identify ZIP, GZIP, 7z, RAR and TAR signatures where detectable from a local file.
Open tool →Local Duplicate File Checker
Compare multiple files by SHA-256 and report exact duplicate groups.
Open tool →About File Inspection & Checksums
Inspect local files, calculate checksums and analyze binary/text characteristics in your browser. MediaZuno groups closely related utilities together so you can move between tasks without hunting across different websites.