Reduce PDF file size while preserving the quality that matters.
What do you need to do?
Convert, compress, edit, inspect and transform files — fast and private.
Popular tools
The ones people reach for every day. No sign-in needed.
Combine several PDFs into one document in the order you choose.
Split one PDF into separate documents by page range.
Export every page of a PDF as a JPG image.
Turn one or many JPG photos into a single PDF.
Shrink JPG, PNG and WebP files with a quality you control.
Change pixel dimensions with aspect-ratio locking.
Convert between JPG, PNG, WebP, AVIF and GIF.
Add a password and set permissions on a PDF.
Draw, type or upload a signature and place it on the page.
Pretty-print, collapse and inspect JSON instantly.
Create a QR code for a link, text, Wi-Fi or vCard.
Browse by category
Fifteen categories, built to hold hundreds of tools without becoming a wall of icons.
PDF tools
52 tools
Merge, split, compress, convert, protect and sign PDF documents.
Most used: Merge PDF
Images tools
31 tools
Compress, resize, crop, convert and retouch images in the browser.
Most used: Image Compressor
Video tools
16 tools
Trim, compress, convert and extract audio from video files.
Most used: Compress Video
Audio tools
12 tools
Convert, trim, normalise and inspect audio files.
Most used: Convert Audio
Developer tools
33 tools
Formatters, encoders, generators and inspectors for daily dev work.
Most used: JSON Formatter
Data tools
14 tools
Convert, clean and reshape CSV, JSON, XML and tabular data.
Most used: CSV Viewer
Text tools
18 tools
Count, clean, compare, transform and analyse text.
Most used: Word Counter
Web & SEO tools
19 tools
Inspect pages, headers, DNS and metadata before you ship.
Most used: Meta Tag Preview
Design & Color tools
17 tools
Colour conversion, contrast, gradients, shadows and SVG helpers.
Most used: HEX to RGB
Security & Privacy tools
19 tools
Hashes, tokens, metadata scrubbing and privacy-focused utilities.
Most used: Password Generator
Calculators tools
16 tools
Percentage, finance, date, health and everyday maths.
Most used: Percentage Calculator
Converters tools
16 tools
Units, currencies, time zones, numbers and measurement systems.
Most used: Unit Converter
Email tools
13 tools
Inspect headers, preview HTML mail and validate delivery records.
Most used: Email Header Analyzer
WordPress tools
11 tools
Webmaster helpers for WordPress sites, themes and migrations.
Most used: Salt Key Generator
More tools
14 tools
GIF and animation, archives, barcodes and other everyday helpers.
Most used: GIF Maker
Popular workflows
Chain tools into one pass. Pick a template, set each step, run it on your files.
Processing philosophy
Local first. Server when necessary. Account only when necessary.
Most everyday tasks — merging a PDF, compressing an image, formatting JSON — run entirely in your browser. Files never leave your device. When an operation genuinely needs server processing, the interface tells you so before you start, in plain words.
- Every tool declares its processing mode: local, server or hybrid.
- The badge is shown inside the tool, not buried in a policy page.
- No claims of certifications or retention guarantees that have not been built and audited.
Bulk processing
Process many files at once
A lightweight job dashboard for the days when you have two hundred scans, not one. Track every file, retry failures individually and download the lot as a ZIP. Bulk needs a free account so we can protect shared resources and give you reliable job tracking.
Developers Early access
Every OmniKitly tool, programmable.
The same tool definitions that power this site power a REST API: upload a file, submit a job naming a tool, poll it or fetch the signed result URL when it is done. Create a free account, generate a key, and it works today — no SDK or webhooks yet, and the shape can still change.
POST /v1/jobs
// This works today — try it with a real key from /account
POST /v1/jobs
Authorization: Bearer ok_live_••••••••
{
"tool": "compress-pdf-to-target-size",
"operation": "pdf.compressToSize",
"uploads": ["5c2c9e14-…"],
"settings": { "target": 500, "unit": "KB" }
}Why OmniKitly
A utility platform should feel like a well-organised toolbox, not a marketing funnel.