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Free Conversion Tools

Convert Anything
Instantly Free

13 professional conversion tools that run entirely in your browser. Number bases, units, timestamps, data formats — all free, all instant, all private. No uploads, no signup, no limits.

13
Conversion Tools
1.5M+
Monthly Searches
Zero
Server Uploads
Free
Cost

All 13 Conversion Tools

Click any tool to start converting instantly. Every tool works in your browser — your data never leaves your device.

Popular

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and back. Supports seconds and milliseconds.

Use tool free
Popular

Number Base Converter

Convert numbers between binary, octal, decimal and hexadecimal bases instantly.

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Temperature Converter

Convert between Celsius, Fahrenheit and Kelvin with instant results and formula display.

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Popular

Unit Converter

Convert length, weight, volume, speed, area and data units. 50+ unit types supported.

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Byte Converter

Convert between bytes, KB, MB, GB, TB and PB. Binary (1024) and decimal (1000) modes.

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Roman Numeral Converter

Convert Roman numerals to Arabic numbers and back. Supports values up to 3999.

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Binary to Text Converter

Convert binary code to ASCII text and text to binary. Supports 8-bit encoding.

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Hex to Text Converter

Convert hexadecimal strings to readable ASCII text and text to hex values.

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Popular

ASCII Table

Interactive ASCII reference chart with decimal, hex, octal and binary values. Search and filter.

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Epoch Converter

Convert millisecond epoch timestamps to dates and dates to epoch. Multiple timezone support.

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Popular

Currency Converter

Convert between 150+ world currencies with live exchange rates. Updated daily from public APIs.

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XML to JSON Converter

Convert XML data to clean JSON format. Handles attributes, nested elements and namespaces.

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JSON to XML Converter

Convert JSON data to well-formed XML with customizable root element and indentation.

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Why Instant Conversion Tools Save Time

Developers spend an average of 23 minutes per day on manual data conversions — converting between number bases, reformatting JSON, parsing timestamps. That adds up to over 100 hours per year of repetitive work that a good conversion tool eliminates in seconds.

Our Number Base Converter handles binary, octal, decimal, and hexadecimal in a single interface — no more mental math or switching between calculator apps. The Unix Timestamp Converter parses epoch values instantly, saving you from decoding cryptic log entries.

For data migration tasks, the JSON to CSV and CSV to JSON tools handle nested objects, arrays, and special characters correctly — no more writing one-off Python scripts for simple format changes.

Every tool runs entirely in your browser. Your data never touches our servers. Whether you're converting sensitive production data or just checking a hex value, your privacy is absolute.

Built For Every Conversion Task

Number Systems

Convert between binary, hexadecimal, octal, and decimal instantly. Essential for developers working with low-level data, networking, or embedded systems.

Number Base Converter

Units & Measurements

Convert temperature, length, weight, volume and more. Stop Googling "feet to meters" — get precise conversions with full unit breakdowns.

Temperature ConverterUnit ConverterByte Converter

Data Formats

Transform data between JSON, CSV, Base64, and other formats. Perfect for API testing, data migration, and format-shifting between systems.

Time & Date

Convert Unix timestamps to human-readable dates, parse epoch values, and work across timezones. Crucial for debugging logs and scheduling.

Unix Timestamp ConverterEpoch Converter

SlapMyWeb vs Other Conversion Tools

Why juggle 10 different converter websites when one does it all?

Feature
SlapMyWeb
ConvertWorld / Others
Number Base Converter (Bin/Oct/Hex/Dec)
Binary to Text / Text to Binary
—
Hex to Text / Text to Hex
—
Unit Converter (Length/Weight/Volume)
Temperature Converter (C/F/K)
Byte/Data Size Converter
—
Unix Timestamp Converter
—
Epoch Converter
—
JSON to CSV / CSV to JSON
—
Base64 Encoder/Decoder
—
Roman Numeral Converter
—
100% Browser-Based (No Upload)
—
No Signup Required
—
Unlimited Conversions
—

How Our Conversion Tools Work

  1. 1

    Pick a converter

    Choose from number base, unit, timestamp, data format, or other specialized converters above.

  2. 2

    Enter your value

    Type or paste the value you want to convert. Most tools auto-detect the input format and show instant results.

  3. 3

    See all results

    Get conversions across all supported output formats simultaneously. No need to run the tool multiple times.

  4. 4

    Copy & use

    Click to copy any result to your clipboard. All conversions happen in your browser — your data never leaves your device.

Conversions are just the start

These tools fix one thing each. Our AI scanner checks 240+ SEO signals across 10 pillars — images, performance, content, links, schema and more — in 30 seconds.

Run a free scan

Frequently Asked Questions

How accurate are these conversion tools?+
All conversions use standard IEEE 754 floating-point arithmetic and official SI unit definitions. Number base conversions are exact (integer math). Unit conversions match the precision of your input — we never round silently. Temperature uses the official formulas (C = (F-32) x 5/9, K = C + 273.15).
What number bases do you support?+
The Number Base Converter supports binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). You can also convert between binary/hex and plain text using the dedicated Binary to Text and Hex to Text tools.
Can I convert JSON to CSV and back?+
Yes. The JSON to CSV tool flattens nested JSON objects into columnar CSV format, and the CSV to JSON tool parses CSV headers into JSON keys. Both handle edge cases like nested objects, arrays, and special characters in values.
Do these tools work offline?+
Once the page loads, all conversion tools work entirely in your browser with no server communication. If you lose internet after loading the page, conversions will still work. Bookmark the tools for quick access anytime.
What units does the Unit Converter support?+
Length (mm to miles), weight (mg to tons), volume (ml to gallons), area, speed, and more. The Byte Converter handles digital storage units from bits to petabytes. The Temperature Converter covers Celsius, Fahrenheit, and Kelvin.
Is my data safe when using these converters?+
Absolutely. Every conversion happens locally in your browser using JavaScript. We never send your data to any server. No cookies, no tracking, no analytics on your input. Your data stays on your device.

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