JSON Formatter & Validator
Validate, format, or minify JSON; syntax errors are reported with position and reason.
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
35 tools found
Runs in your browserBase64 Encoder / Decoder
Convert between UTF-8 text and standard Base64. Base64 is encoding, not encryption.
Encoding
URL Encoder / Decoder
Percent-encode URL parameter values or use form-style spaces (+). Decode UTF-8 escapes locally; 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 Digest
Compute the 32-hex-digit MD5 digest of UTF-8 text. Irreversible; not for passwords or signatures.
Hash & Security
SHA Hash Digest
Compute SHA-1 / SHA-256 / SHA-384 / SHA-512 digests via the Web Crypto API.
Hash & Security
Random Password Generator
Generate passwords with cryptographically secure randomness; mix cases, digits, and symbols.
Hash & Security
Text Statistics
Count characters, words, lines, paragraphs, and UTF-8 bytes; estimate reading time.
Text & Data
Regex Tester
Enter a pattern and test text; lists every match position and capture group.
Text & Data
Timestamp Converter
Convert between Unix timestamps and local date-time; seconds and milliseconds supported.
Time & Numbers
Base Converter
Convert integers between binary, octal, decimal, and hex. BigInt-based, arbitrary size.
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
Days, weeks, months and working days between two dates, with optional inclusive counting.
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
Line-by-line comparison of two texts, marking added and removed lines; long unchanged runs are collapsed.
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
Converts images to Base64, Data URL, CSS or HTML form — processed locally with preview, never uploaded.
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
PDF Merge
Merge multiple PDFs into one file, in order — processed entirely in your browser, never uploaded.
Files & Images
PDF Page Extractor
Extract page ranges (e.g. 1-3,5) from a PDF into a new file — local processing, no upload.
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
Placeholder Text (Lorem Ipsum)
Generates Lorem Ipsum or Chinese placeholder text by paragraphs, sentences, or words.
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