Ulvixor

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137+ free tools and growing

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Search over 130 free tools. Everything runs in your browser — your data never leaves your device.

Search tools

Search all of Ulvixor's tools by name or keyword.

JSON Formatter & ValidatorSecure Password GeneratorQR Code GeneratorMerge PDF (File Combiner)CSV to JSON ConverterPercentage Calculator

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No waiting, no usage limits.

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Nothing is uploaded to a server.

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Free, no accounts, no limits.

🔥 Most used

JSON Formatter & Validator

Format, validate, and minify JSON instantly.

Secure Password Generator

Create random, secure passwords with customizable length and character types.

QR Code Generator

Turn text or links into a QR code and download it as a PNG instantly.

Merge PDF (File Combiner)

Combine several PDF files into one, in the order you choose, without uploading anything online.

CSV to JSON Converter

Convert CSV files to JSON instantly, right in your browser.

Percentage Calculator

Calculate percentages, what percent one value is of another, and percentage changes between two numbers.

Word Counter

Count words, characters, sentences, and paragraphs in real time.

Image Compressor

Reduce an image's file size by adjusting the quality, directly in your browser.

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JSON Formatter & Validator

Format, validate, and minify JSON instantly.

Base64 Encoder & Decoder

Encode text to Base64 or decode it back, with full Unicode support.

UUID v4 Generator

Generate one or many random UUID v4s instantly.

JWT Decoder

Decode a JWT's header and payload and view them as JSON.

Regular Expression Tester

Test regular expressions in real time and inspect matches and groups.

XML Validator

Validate an XML document's syntax and view it formatted.

YAML Validator

Validate YAML syntax and view the parsed structure as JSON.

Cron Expression Generator

Build cron expressions with guided controls or decode an existing one in plain English.

URL Encoder & Decoder

Encode or decode text for use in URL parameters.