verified_user 100% Client-Side Processing

Air-Gapped Utility.
Zero Data Retention.

Execute cryptographic operations, generate secure credentials, and format data locally. Your browser is the execution environment. Nothing is transmitted. Nothing is stored.

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Core Utilities

memory Local Execution Active

JSON Formatter

Format, validate, minify, and beautify JSON instantly. Client-side processing for maximum privacy.

data_object
{"example": "paste your JSON..."}
Ready

HEIC Converter

Convert iPhone photos to PNG/JPG.

image
PNG
JPG

Image Compressor

Reduce file size without quality loss.

compress
Drop image to compress... upload Upload File
straighten

Unit Converter

Length, weight, temperature & data storage conversions.

Open Tool arrow_forward
translate

Base64 Encoder

Encode/decode text & images to Base64 format.

Open Tool arrow_forward

Why Use UtilLab?

Most online tools upload your files to remote servers, risking privacy and slowing down your workflow. UtilLab processes everything locally in your browser using modern Web APIs and WebAssembly. Your files never leave your device.

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Zero Uploads

All processing happens client-side. Nothing leaves your machine.

bolt

Instant Results

No queue, no waiting, no server limits.

money_off

Free Forever

Basic tools are 100% free, supported by minimal ads.

code

Developer Friendly

Clean APIs, open formats, no watermarks.