JSON Formatter & Validator
Format JSON online, beautify or minify API responses, and check strict JSON syntax with error details. Processing stays in your browser.
Text & Data
AI Image Generator
Start with a sentence. Create an image.
Turn your ideas into images. From social graphics and product concepts to storybook illustrations, describe what you imagine and create it with Vubilo AI. No sign-up. Generate, then download.
From a generated image to something you can use
- Describe the subject and choose a ratio; inspect the generated details.
- Download the original, then compress or scale down for your destination.
- Check pixels, file size and appearance. Keep the original before using the result.
THE TOOLKIT
Find your next handy tool
Base64 Encoder / Decoder
Encode UTF-8 text to Base64 or decode Base64 to text in your browser. Supports multilingual text; Base64 is encoding, not encryption.
Encoding
URL Encoder / Decoder
Encode URL parameter values or decode percent-encoded text online. Supports UTF-8 and form-style spaces (+); not a whole-URL encoder.
Encoding
JWT Decoder
Decode a JWT's header and payload, with issued-at and expiry status; signature is not verified.
Encoding
MD5 Hash Generator
Generate a 32-character MD5 hash from UTF-8 text in your browser. This tool creates hashes; it cannot decrypt MD5 or recover the original text.
Hash & Security
SHA-256 & SHA Hash Generator
Generate SHA-256, SHA-1, SHA-384 or SHA-512 hashes from text using the Web Crypto API. Compare text digests locally without uploading your input.
Hash & Security
Random Password Generator
Generate random passwords with secure browser randomness. Choose 4–64 characters and allowed letters, numbers or symbols; generate locally without an account.
Hash & Security
Word & Character Counter
Count words and characters online, with or without whitespace. Check lines, paragraphs, UTF-8 bytes and estimated reading time in your browser.
Text & Data
JavaScript Regex Tester
Test JavaScript regular expressions online and inspect match positions and capture groups. Runs in your browser with JavaScript regex syntax.
Text & Data
Unix Timestamp Converter
Convert Unix timestamps to dates or dates to epoch time. Supports seconds and milliseconds, with local and UTC date output.
Time & Numbers
Number Base Converter
Convert integers between binary, octal, decimal and hexadecimal. Handles large integers locally; fractional numbers are not supported.
Time & Numbers
HEX, RGB & HSL Color Converter
Convert between HEX, RGB, and HSL with a live swatch. Accepts #1A9CB0, rgb(26,156,176).
Time & Numbers
UUID Generator
Batch-generate RFC 4122 v4 random UUIDs from a cryptographically secure source.
Generators
QR Code Generator
Turn text or links into a PNG QR code, drawn locally and ready to save.
Generators
Date Difference Calculator
Calculate days between dates, plus weeks, months and working days. Choose whether to include the end date; public holidays are not deducted.
Time & Numbers
Cron Expression Parser
Parses a 5-field cron expression, explains each field, and lists the next 5 run times.
Time & Numbers
Case Converter
Converts a phrase into camelCase, PascalCase, snake_case, kebab-case and 5 more styles at once.
Text & Data
Text Diff Checker
Compare two texts line by line and see added or removed lines. A local text comparison tool, not a plagiarism detector or semantic similarity score.
Text & Data
Unicode Escape
Converts text to and from \uXXXX escapes; also decodes \xNN and \u{…} forms, with optional ASCII-only escaping.
Encoding
AES Encrypt / Decrypt
Password-derived key (PBKDF2) + AES-256-GCM encryption with Base64 output; fully reversible.
Hash & Security
Random Number / Picker
Random numbers in a range or random picks from a list, using a cryptographically secure RNG.
Generators
URL Slug Generator
Turns titles into URL-friendly slugs; Chinese can be transliterated to pinyin, kept, or stripped.
Text & Data
Image to Base64
Convert an image to Base64 or a Data URL, with ready-to-copy CSS and HTML. Preview the image locally without uploading it; image-to-text encoding only.
Encoding
Time Zone Converter
Enter a time in one zone and convert it to 14 major world time zones at once, with UTC offsets and timestamp.
Time & Numbers
Merge PDF Files
Combine PDF files into one PDF in your chosen order. Merge documents locally in your browser without uploading the files.
Files & Images
Extract Pages from PDF
Extract selected PDF pages or ranges, such as 1–3,5, into one new PDF. Choose the pages to keep and process the file locally without uploading it.
Files & Images
Batch Image Compressor / Converter
Compress JPG, PNG or WebP to 100KB, 200KB or a custom target. Resize up to 20 images and download a ZIP. Free, local processing with no uploads.
Files & Images
chmod Calculator
Tick read/write/execute boxes to get the octal (755) and symbolic (rwxr-xr-x) forms plus a ready-to-paste chmod command.
Dev Reference
HTTP Status Codes
Look up HTTP status codes by category or keyword, with meanings, typical scenarios, and debugging hints.
Dev Reference
Markdown Preview
Type Markdown and get a live rendered preview, with copyable HTML output.
Text & Data
Lorem Ipsum Generator
Generate Lorem Ipsum or Chinese placeholder text by paragraphs, sentences or words. Use it to test layouts; it does not generate natural-language articles.
Generators
JPG / PNG to PDF
Convert JPG, PNG or WebP photos and screenshots into one PDF for free. Reorder pages, choose A4 or Letter and set margins. No sign-up; files are processed locally.
Files & Images
HEIC to JPG
Convert HEIC or HEIF photos to JPG for free in your browser. Batch up to 10 files, adjust quality and download a ZIP. Your photos are not uploaded.
Files & Images
HEIC to PNG
Convert up to 10 HEIC or HEIF photos to PNG in your browser. Keep decoded dimensions or resize, preview results and download individual PNGs or a ZIP. No sign-up.
Files & Images
HEIC to PDF
Combine up to 10 HEIC or HEIF photos into one PDF. Reorder pages, choose A4 or Letter and set margins. Local browser processing, no sign-up or photo uploads.
Files & Images