Free Online Tools for Developers & Creators

Fast, private, and easy-to-use tools that run entirely in your browser. No sign-up, no data collection, no limits.

Developer Tools

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JSON Formatter

Format, validate, and minify JSON data with syntax highlighting and error detection.
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Regex Tester

Test regular expressions in real-time with match highlighting and group extraction.
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Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text input.
B64

Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 strings back to plain text instantly.
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URL Encoder/Decoder

Encode and decode URLs with percent-encoding for safe transmission.
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CSS Minifier

Minify CSS code to reduce file size and improve page loading speed.
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Diff Checker

Compare two texts side-by-side with highlighted additions, deletions, and changes.
JWT

JWT Decoder

Decode JSON Web Tokens to inspect header, payload, and expiration status.

Generators & Converters

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Password Generator

Generate cryptographically secure passwords with strength analysis and batch mode.
ID

UUID Generator

Generate universally unique identifiers (UUID v4) with bulk generation support.
QR

QR Code Generator

Generate QR codes from text or URLs with custom colors and sizes. Download as PNG.
🎨

Color Picker & Converter

Pick colors, convert formats, check WCAG contrast, and generate gradients.
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Number Base Converter

Convert between binary, octal, decimal, and hex with interactive bit visualization.
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Timestamp Converter

Convert between Unix timestamps and human-readable date/time formats.
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Lorem Ipsum Generator

Generate placeholder text in paragraphs, sentences, or words for your designs.
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Markdown Preview

Write and preview Markdown with live rendering and export to HTML.
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Text Counter

Count words, characters, sentences, and paragraphs with reading time estimation.

AI & Media Tools

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Text to Speech AI

Generate natural AI speech in your browser. 10 voices, adjustable speed, WAV download. 100% local & private.

Why TensorLocal?

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Lightning Fast

All tools run entirely in your browser. No server round-trips, instant results.

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100% Private

Your data never leaves your device. We don't collect, store, or transmit anything.

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Completely Free

All tools are free to use with no limits, no sign-up, and no hidden fees.

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Works Everywhere

Fully responsive design that works on desktop, tablet, and mobile devices.