File & Conversion Instruments

File Splitter, ZIP & Data Converter Suite

ZIP/Unzip, split big files into smaller chunks & rejoin them, CSV ↔ JSON, Base64, SHA-256 hash checksums, Markdown ↔ HTML, XML ↔ JSON, and duplicate file finders.

Zero Upload Privacy: File operations happen strictly on your machine using browser APIs.

Big File Splitter & Rejoiner

Split any large file into smaller N-MB chunks (.part1, .part2) for upload limits, and losslessly recreate the original file later.

1. Split Big File Into Chunks

Select a large file to split

Chunk Size (MB)

2. Rejoin Chunks Back Into Original File

Select all chunk files (.part1, .part2, etc.) to reassemble

ZIP Compression & Extraction

Compress multiple files into a `.zip` archive or unpack ZIP contents in-browser.

Create ZIP Archive

Select files to compress into ZIP

Extract ZIP Archive

Select ZIP file to extract

CSV ↔ JSON Converter

Convert spreadsheet CSV data to JSON array or parse JSON into clean CSV format.

Input CSV / JSON Data

Converted Output

File SHA-256 / SHA-512 Checksum

Compute cryptographic hash signatures (SHA-256, SHA-512, SHA-1) using Web Crypto API to verify integrity.

Select file to calculate hash

SHA-256 Hash

SHA-512 Hash

Base64 Encoder & Decoder

Encode text and binary files to Base64 data strings or decode Base64 strings back to original format.

Input String / Data

Result Output

Markdown ↔ HTML Converter

Convert Markdown text into formatted HTML markup or preview live rendered documents.

Markdown Input

HTML Output

Duplicate File Finder

Select a folder or group of files to instantly identify exact duplicate files by content hash.

Select multiple files to scan for duplicates

Bulk Filename Renaming Helper

Apply prefix, suffix, sequential numbering, or slugification to a batch of filenames.

Select files to rename

Add Prefix

Add Suffix