43 free tools live · zero uploads · browser-only
Free file conversion tools: Excel, CSV, XML, JSON and ZIP.
43 file conversion and dev utility tools running entirely in your browser. Convert between Excel, CSV, XML and JSON, format JSON, hash and encode text, generate QR codes, barcodes and favicons, with zero uploads and no account.
- Files never leave your device
- No account needed
- Free to use
The catalog
43 file conversion tools, grouped by task
Pick a category below, then a tool.
Move between spreadsheet formats
Move between Excel and CSV, or split a workbook apart.
Translate structured data
Convert between XML, JSON, CSV and Excel.
XML to Excel
Convert XML data into an Excel spreadsheet.
Excel to XML
Export Excel data to XML format.
XML to CSV
Convert XML data to a CSV spreadsheet.
CSV to XML
Convert CSV files to XML format.
JSON to XML
Convert JSON objects to XML format.
XML to JSON
Convert XML data to JSON format.
CSV to JSON
Convert CSV data to JSON format.
JSON to CSV
Convert JSON arrays to CSV spreadsheets.
Handy tools for developers
JSON, Base64, hashing, UUIDs, passwords, regex and more.
JSON Formatter / Validator
Pretty-print, minify, and validate JSON.
Base64 Encoder/Decoder
Encode text to Base64, or decode Base64 back to text.
Hash Generator (MD5/SHA-256)
Generate an MD5 or SHA-256 hash from text or a file.
UUID Generator
Generate one or more random UUIDs (v4).
Password Generator
Generate a strong, random password.
Regex Tester
Test a regular expression against sample text.
URL Encoder/Decoder
Encode or decode text for safe use in a URL.
Markdown ↔ HTML Converter
Convert Markdown to HTML, or HTML back to Markdown.
JWT Decoder
Decode a JSON Web Token to view its header and payload.
Meta Tag Generator
Generate title, description, Open Graph, and Twitter Card meta tags.
Cron Expression Builder
Build and understand cron expressions with a plain-English explanation.
HTML Entity Encoder / Decoder
Encode text to HTML entities or decode entities back to text.
Subnet Calculator
Calculate network address, broadcast address, and host range from CIDR.
URL Parser
Break a URL down into its protocol, host, path, and query parameters.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
Roman Numeral Converter
Convert between Roman numerals and regular numbers, both directions.
GCD / LCM Calculator
Find the greatest common divisor and least common multiple of numbers.
Prime Number Checker
Check if a number is prime and see its prime factorization.
Quadratic Equation Solver
Solve ax squared plus bx plus c equals 0 for real or complex roots.
Ohm's Law Calculator
Calculate voltage, current, resistance, or power from any two values.
Codes, icons and scanners
QR codes, barcodes, favicons, app icon sets, and scanners for both.
QR Code Generator
Generate styled QR codes with custom dots, corners, colors and a center logo.
Barcode Generator
Generate a standard 1D barcode (Code 128) from text or numbers.
Favicon Generator
Generate a complete multi-size favicon package with live previews for every platform.
App Icon Generator (iOS/Android)
Generate a full set of iOS and Android app icon sizes.
PNG to ICO
Convert a PNG image into a Windows .ico icon file.
QR Code Scanner
Scan a QR code using your camera, or upload an image containing one.
Barcode Scanner
Scan a 1D barcode using your camera, or upload an image containing one.
Identicon / Avatar Generator
Generate a unique, deterministic geometric avatar from any text seed.
Signature Generator
Turn your typed name into a styled signature image you can download.
Wi-Fi QR Code Generator
Generate a scannable QR code that connects phones to your Wi-Fi.
Bundle it all together
Bundle files together into a ZIP.
Why use it
Built the same way as every other Slaytic tool
- 01
100% private
Every tool processes your file using JavaScript inside your browser tab. Nothing is ever uploaded to a server.
- 02
Instant results
No upload wait, no queue. Processing runs on your own device and finishes in seconds.
- 03
Always free
No account, no trial, no limits. Every file conversion tool is free to use without restriction.
Questions
Before you dive in
Are all these file conversion tools free?
Yes. All 27 tools are completely free with no limits, no premium tier, and no account required.
Do my files get uploaded to a server?
No. Every tool uses SheetJS, Papa Parse, JSZip, or the native browser DOM API, all running entirely in your browser. Your files never leave your device.
How do I convert CSV to Excel for free?
Open the CSV to Excel tool, drop your CSV file, and click Convert. SheetJS processes it in your browser and your Excel file downloads instantly.
Is there a file size limit?
No enforced limit. Very large files may process more slowly since everything runs locally on your device.