Free online PDF, image & developer tools
Merge PDFs, compress images, format JSON, and more. Many tools run in your browser, so files never leave your device; the rest are deleted right after download. No signup, no watermarks, no limits.
56 tools · 100% free · No registration
PDF Tools
Merge, split, compress, convert, protect, and repair PDF documents
- Merge PDFCombine multiple PDF files into a single document
- Split PDFExtract pages or split a PDF into separate files
- Compress PDFReduce PDF file size while maintaining quality
- PDF to ImageConvert PDF pages to JPG or PNG images
- Image to PDFConvert images into a PDF document
- Rotate PDFRotate PDF pages by 90, 180, or 270 degrees
- Watermark PDFAdd text watermarks to PDF pages
- Page NumbersAdd page numbers to a PDF document
- Protect PDFPassword-protect and encrypt a PDF document
- Unlock PDFRemove password protection from a PDF
- Organize PDFReorder, delete, and rearrange PDF pages
- Repair PDFFix corrupted or damaged PDF files
- Convert PDFConvert documents to and from PDF format
- Word to PDFConvert Word documents to PDF format
- Excel to PDFConvert Excel spreadsheets to PDF format
- PowerPoint to PDFConvert PowerPoint presentations to PDF format
- HTML to PDFConvert HTML files to PDF documents
- PDF to WordConvert PDF documents to editable Word files
- PDF to ExcelExtract tables from PDF into Excel spreadsheets
- PDF to PowerPointConvert PDF pages to PowerPoint slides
- PDF to PDF/AConvert PDF to the archival PDF/A-2b standard
Need to work with images instead? Utilavo also includes a full set of online image editing tools: resize, crop, compress, rotate, watermark, and convert between 8 formats including JPG, PNG, WebP, AVIF, and HEIC. Images are processed on our servers and deleted right after download.
Image Tools
Resize, compress, convert, and edit images
- Resize ImageChange image dimensions with precise control
- Compress ImageReduce image file size without visible quality loss
- Convert ImageConvert between JPG, PNG, WebP, and other formats
- Crop ImageTrim and crop images to any aspect ratio
- Rotate ImageRotate, flip, and mirror images
- Watermark ImageAdd text watermarks to images
Format converters
- PNG to JPG Converter
- JPG to PNG Converter
- WebP to JPG Converter
- JPG to WebP Converter
- WebP to PNG Converter
- PNG to WebP Converter
- PNG to AVIF Converter
- JPG to AVIF Converter
- AVIF to JPG Converter
- TIFF to JPG Converter
- GIF to JPG Converter
- GIF to PNG Converter
- HEIC to JPG Converter
- HEIC to PNG Converter
- HEIC to WebP Converter
For data formatting, encoding, hashing, and encryption, the developer tools section covers the quick transformations that come up daily in software development, from JSON validation to regex testing to cryptographic operations.
Developer Tools
Format, validate, encode, and transform data
- JSON FormatterFormat, validate, and prettify JSON data online for API debugging and code review
- Base64 EncoderEncode and decode Base64 strings and files for APIs, emails, and data URIs
- URL EncoderEncode and decode URL components online for safe query strings and API parameters
- Hash GeneratorGenerate MD5, SHA-256, SHA-512, BLAKE3, and 25+ cryptographic hashes to verify file integrity
- Regex TesterTest and debug regular expressions online with live matching and capture groups
- Color ConverterConvert colors online between HEX, RGB, HSL, OKLCH, and CMYK for CSS and design
- Epoch ConverterConvert Unix timestamps to human-readable dates online with live clock and timezone support
- HMAC GeneratorGenerate HMAC-SHA256 and HMAC-SHA512 authentication codes to sign API requests and verify webhooks
- Random String GeneratorGenerate secure random passwords, API keys, and tokens with cryptographic randomness
- Encrypt / DecryptEncrypt and decrypt data with AES, DES, Triple DES, and RC4 symmetric ciphers
Latest guides
Practical tutorials and in-depth guides for working with PDFs, images, and developer tools.
How to Split a PDF and Extract Pages
A complete guide to splitting PDF documents and extracting specific pages, covering page ranges, single-page extraction, splitting by intervals, and lossless processing.
How to Resize Images Without Losing Quality: A Guide
Learn how to resize images while preserving sharpness, covering resampling algorithms, aspect ratio, DPI versus pixel dimensions, and the limits of upscaling.
How to Compress PDF Files for Email
Learn the best techniques to reduce PDF file size for email attachments, including compression levels, splitting strategies, and quality trade-offs.
Reference data
Reference datasets behind our tools, compiled from primary sources, with methodology and raw data.
Symmetric Cipher NIST Status 2026: Dataset by Algorithm
A consolidated reference for the symmetric ciphers exposed by Utilavo's encryption tools. Status, key and block sizes, and deprecation dates are sourced directly from NIST SP 800-131A Rev 2 and SP 800-57 Part 1 Rev 5 so the recommendation column is auditable.
PDF/A Archival Conformance Matrix: Levels 1a Through 3u
A structured comparison of the eight PDF/A conformance levels defined by ISO 19005 Parts 1 to 3, each mapped to its practical archival use case. PDF/A-4 (ISO 19005-4:2020) is not yet covered. The matrix exists because the PDF/A levels are commonly conflated, and choosing the wrong level routinely causes archive ingestion failures.
What is Utilavo?
Utilavo is a free online platform with over 50 online tools for PDF editing, image processing, and developer utilities. No signup, no watermarks, and no software installation required. Tools include merging PDFs, compressing images, formatting JSON, generating cryptographic hashes, and dozens more.
The tools span three main areas: document workflows (merge, split, compress, convert, and secure PDF files), image optimization (resize, crop, compress, and convert between formats like JPG, PNG, WebP, and AVIF), and developer data transformation (format JSON, encode Base64, generate hashes, test regex, and encrypt data with industry-standard algorithms).
Privacy is built into the platform. Many tools, including the PDF merge, split and developer tools, run entirely in your browser. Tools that require server-side processing, such as PDF compression and document conversion, transfer files over encrypted HTTPS and delete them immediately after your download completes.
Utilavo is built on established open-source technology: pdf-lib for browser-side PDF manipulation, MuPDF for compression, Ghostscript for PDF/A, LibreOffice for document conversion, sharp for image processing, and Web Crypto APIs for hashing and encryption. Non-intrusive ads keep the platform free and sustainable. Learn more on the About page.
How it works
Choose a tool
Browse by category or search by name. Each tool page explains what it does, how it works, and answers common questions.
Upload or paste your data
Drag and drop files into the upload zone, or paste text and data directly into developer tools. Files up to 50 MB are supported.
Download your result
Processing happens instantly in your browser or on the server. Download the result and your files are gone; nothing is stored.
Why Utilavo?
No account required
Every tool works immediately: no signup, no email, no login prompts.
Privacy-first processing
Many tools run in your browser. Server tools delete files immediately after download.
50+ professional tools
PDF, image, and developer tools covering the most common file processing tasks.
Built on open source
Powered by established libraries: pdf-lib, Ghostscript, LibreOffice, sharp, and more.
Works on any device
Fully responsive: works on phones, tablets, and desktops with no app to install.
Free and sustainable
Non-intrusive ads keep all tools free. No premium tiers or locked features.
Frequently asked questions
Are Utilavo tools really free?
Yes. Every tool is completely free with no subscriptions, usage limits, or watermarks. There are no premium tiers, no hidden costs, and no features locked behind a paywall or login wall.
Are my files safe?
Browser-based tools process files on your device, with no upload. Server-based tools transfer over encrypted HTTPS, process in isolation, and delete immediately after download. Files are never stored, logged, or shared.
Do I need to create an account?
No. All tools work immediately without accounts, signups, or email. Open any tool, upload your file, and start processing. No trial periods or login prompts.
What file size limit applies?
The maximum is 50 MB per file for all tools. For larger PDFs, split them first, process each part, then merge the results.
What types of tools does Utilavo offer?
Three categories: PDF tools (merge, split, compress, convert, secure), Image tools (resize, crop, compress, rotate, watermark, convert between JPG/PNG/WebP/AVIF/HEIC), and Developer tools (JSON formatter, Base64 encoder, hash generator, regex tester, encryption).
Can I use Utilavo on mobile devices?
Yes. Utilavo is fully responsive and works on phones, tablets, and desktops. All tools have touch-friendly controls and adapt to any screen size.