🖼️ File & Browser Utilities Category (19 Tools)

Private browser-based tools for PDF merging and extraction, images, JWT, JSON, text, units, passwords, QR codes, and more.

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Privacy First

Smart Image Compressor

Compress JPG, PNG & WebP images locally using browser Canvas rendering.
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Image to PDF Converter

Combine multiple images into a single clean PDF document locally.
📏

Universal Unit Converter

Convert metrics across Length, Weight, Temperature, and Data size.
✍️

Text Utilities & Word Counter

Count words, characters, transform case, and format text strings.
💱

Universal Currency Converter

Convert and compare dated reference exchange rates across 20+ major currencies.
🏁
Utility

Custom QR Code Generator

Generate custom QR codes for URLs, text, Wi-Fi, and contacts locally.
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Security

Secure Password Generator

Generate strong, cryptographic random passwords and passphrases locally.
🆔

UUID / GUID Generator

Generate cryptographic RFC4122 Version-4 UUIDs in bulk.
💻
Developer

JSON Formatter & Validator

Beautify, format, minify, and validate JSON data strings locally.
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Base64 Encoder & Decoder

Encode text strings and files to Base64 or decode Base64 data strings.
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URL Encoder & Decoder

Percent-encode special characters in URLs or decode encoded URI strings.
🔍

Regex Tester & Matcher

Test regular expression patterns against test strings with live match highlighting.
⏱️

Unix Timestamp Converter

Convert Unix epoch timestamps to ISO dates and human-readable calendar times.
🎨

Color Code Converter (HEX, RGB, HSL)

Convert color codes across HEX, RGB, HSL, and CMYK color spaces.
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Image Resizer

Resize image pixel dimensions (width & height) locally while keeping aspect ratio.
🖼️

Image Format Converter

Convert image formats between JPG, PNG, and WebP locally in browser.
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Privacy First

PDF Merger

Combine multiple PDF files into one document locally in your browser without uploading private files.
✂️
Privacy First

PDF Splitter & Page Extractor

Extract selected pages from a PDF into a new document locally in your browser without uploading the original.
🔐
Developer

JWT Decoder

Decode a JWT header and payload locally, inspect claims, and check expiration without sending the token anywhere.

Choose a private browser utility safely

Calcixa’s converters process supported inputs on the device. The collection includes image and PDF workflows, text and data encodings, developer inspection tools, and unit or currency transformations.

Images and PDFs

Compress, resize, convert, combine, or split files while retaining the original. Re-encoding can remove detail or metadata, and PDF changes can affect signatures, forms, links, bookmarks, and accessibility.

Text, identifiers, and developer data

JSON formatting, Base64, URL encoding, UUIDs, timestamps, regular expressions, and JWT decoding solve representation or inspection tasks. Encoding is not encryption, and JWT decoding is not signature verification.

Everyday conversion and generation

Unit and currency tools depend on correct units and rates. QR codes and passwords should be tested or stored safely; generation does not validate a destination or protect against phishing.

Before using a result

  1. Keep the original file or value.
  2. Confirm format, units, rate direction, and output order.
  3. Inspect the downloaded or decoded result.
  4. Do not treat conversion as security validation.

Each tool includes a practical guide, common mistakes, sources, and limitations. Read our calculation and tool methodology for testing, rounding, privacy, and corrections.