File Tools
Extract archives, inspect file checksums, and manage file headers with in-browser speed.
Free online File Utilities tools.
Add Prefix
Prepend custom strings or dates to lists of filenames in one click.
Add Suffix
Append version tags, timestamps, or suffixes before file extensions.
Base64 to File Downloader
Decode Base64 data strings and save them as downloadable binary files.
Batch Rename
Generate batch file renaming patterns with prefix, suffix, and sequential numbering.
Binary File Viewer
Inspect raw byte values of local files in hexadecimal and ASCII representations.
Bulk Folder CMD Generator
Generate Windows CMD / PowerShell batch folder creation scripts (mkdir).
Bulk Folder Creator
Generate Bash / Linux shell scripts to create complex nested directories.
CSV to TSV Converter
Convert comma-separated files into tab-separated spreadsheet format.
Duplicate Finder
Detect duplicate filenames and file sizes from imported file lists.
Extension Remover
Strip extensions from filenames or batch change to new extension.
Extract File Names
Extract clean file basenames and extensions from full filepath lists.
File Checksum Calculator
Compute cryptographic MD5, SHA-1, and SHA-256 integrity hashes on any local file.
File Extension Changer
Rename and change file extensions safely right in your browser.
File Extension Finder
Identify file types, MIME types, and associated applications from file extensions.
File MIME Type Detector
Inspect true binary file signatures (magic bytes) to identify exact file types.
File Name Cleaner
Sanitize filenames by replacing spaces, emojis, and illegal symbols with clean hyphens.
File Size Calculator
Convert file sizes between Bytes, KB, MB, GB, and TB (1024 vs 1000 base).
File Size Comparator
Compare before and after file sizes and calculate compression percentages.
File to Base64 String Converter
Convert local images, PDFs, and files into Base64 data URIs.
Filename Generator
Generate standardized ISO filenames with timestamps, slugs, and tags.
Folder Size Calculator
Aggregate total directory size from individual file size records.
Folder Tree Generator
Generate clean directory hierarchy trees for README documentation.
Generate Folder Structure
Convert folder path lists into visual ASCII directory trees.
Hex File Inspector
Examine file headers, byte offsets, and hex dump columns.
In-Browser ZIP Extractor
Decompress and inspect ZIP files directly in your browser without uploading.
JSON File Validator
Upload and check local JSON files for syntax errors and schema compliance.
MD5 File Checksum Checker
Verify downloaded file authenticity by checking its MD5 cryptographic hash.
Merge Text Files Online
Combine multiple text or CSV files into one unified document.
Number Files
Apply sequential numbering (01, 02, 001) to filename lists.
Replace Filename Text
Find and replace target substrings or typos across hundreds of filenames.
SHA-256 File Checksum Checker
Compute secure 256-bit hash digests to guarantee files have not been modified.
Sort File Names
Sort list of filenames alphabetically, by length, or natural numerical order.
Split Text File Online
Divide large text documents into smaller chunks by line count or size.
TAR GZ Inspector
Extract and preview compressed tarball archive contents locally.
Text to File Saver
Type or paste text and save it instantly as a .txt, .md, or .json file.
TSV to CSV Converter
Convert tab-separated values into standard comma-separated CSV files.
XML File Validator
Validate XML markup syntax and tag nesting directly in browser.
YAML File Validator
Check YAML files for indentation mistakes and formatting issues.