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Dev & Calc Tools

Format, validate, encode and calculate for everyday tasks.

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Developer

/ developer
{ }

JSON Formatter

Validate and pretty-print JSON.

No signup needed
64

Base64 Encode/Decode

Encode or decode Base64 text, unicode-safe.

No signup needed
#

Hash Generator

Generate SHA-1/256/384/512 hashes.

No signup needed
◐

Color Picker

Pick a color, get HEX / RGB / HSL instantly.

No signup needed

Calculators

/ calculators
%

Percentage Calculator

Three common percentage questions, answered instantly.

No signup needed
Y

Age Calculator

Exact age in years, months and days.

No signup needed
$

EMI / Loan Calculator

Monthly EMI using the standard loan formula.

No signup needed
U

Unit Converter

Convert between metric and imperial length units.

No signup needed
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The most-used dev & calc tools, all in one place

This category brings together the dev & calc tools people reach for most. Every tool on this page runs the same way: upload a file, wait a few seconds, get your result. Nothing requires an account, and no file is kept longer than necessary to produce your download.

Is it safe to use free online tools?

Files uploaded to these tools are processed only to generate your result and are automatically deleted afterward — they are not stored long-term, reviewed, or shared.

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