Privacy matters: most tools process files in your browser. Server-processed files are deleted after download or by the short purge window.
OOmniToolbox

Private utility command center

Free PDF tools, image resizer, and dimensions utilities.

Compress, merge, protect, resize, crop, set exact image dimensions, and prepare signatures with a polished tool surface built for PDFs, photos, and official upload forms.

PDF tools

Compress, merge, protect and convert PDFs.

Image resizer

Resize photos, crop images and compress files.

Image dimensions tool

Set exact width and height in pixels.

Signature resizer

Resize signatures to 140x60, 20 KB or 50 KB.

PDF Search, Highlight, Split and Extract

Open

Search PDF text, highlight matches, extract matching pages, and split selected page ranges locally in the browser.

Compress PDF Online

Open

Reduce PDF file size online with adjustable quality, page scale controls, preview, and instant browser download.

Protect PDF with Password

Open

Add password protection to a PDF locally in the browser and download an encrypted PDF file.

Merge PDF Files

Open

Merge PDF files online, arrange pages in order, review the combined document, and optionally protect the final PDF after merging.

PDF to PNG Converter

Open

Render every PDF page as a PNG image and download all pages in a ZIP file with previews.

Extract Images from PDF

Open

Extract embedded bitmap images from PDF files, preview each image, and download the extracted PNG files.

Image Resizer, Dimensions and Signature Processor

Open

Crop images, resize dimensions, choose background color, preview, compress, and optimize photos or official signatures entirely in the browser.

Why this exists

A practical utility site for files people actually submit.

Readable outputs matter more than tiny files

A file that meets a size limit can still be rejected if names, dates, stamps, faces, signatures, or barcodes are unclear. The tools include previews and final size details so users can check outputs before submitting.

Privacy is built into the workflow

Image, signature, and many PDF tasks run in the browser. Server-assisted routes are designed around temporary files, post-download deletion, and a short purge safety window.

Guides explain realistic limits

Some files cannot be compressed under a strict KB target without becoming unreadable. The guide pages explain why that happens and how to choose the right tool before wasting time on the wrong workflow.

Original resources

Understand the upload rule before editing the file.

How PDF File Size Limits Work on Online Forms

Understand why online forms reject large PDF files, how to prepare smaller PDFs safely, and what to check before uploading certificates, forms, and statements.

Photo and Signature Upload Requirements Explained

A practical guide to photo dimensions, signature size limits, background colors, image formats, and quality checks for online application forms.

PDF vs Image Upload: Which File Should You Use?

Learn when to upload a PDF, when to convert PDF pages to PNG, and how to avoid losing layout, text, or readability during form submissions.

Pre-submit File Checklist for Online Forms

Use this checklist before submitting PDFs, photos, signatures, and document images to online forms, exams, admissions, job portals, and banking websites.

Why PDF Compression Can Increase File Size

Learn why some PDFs become larger after compression, how scanned and text PDFs behave differently, and what to do when a smaller PDF is not possible.

JPG, PNG, and WebP for Online Forms

Choose the safest image format for online forms, understand the difference between JPG, PNG, and WebP, and avoid upload rejection caused by unsupported formats.

Signature Background and Contrast Guide

Prepare a clean digital signature by fixing crop, background color, contrast, dimensions, and file size before uploading to official forms.

PDF Password Safety for Online Submission

Understand when to protect a PDF, when to remove protection before upload, and how password rules affect merging, compression, and online form submission.