Case Modify

PDF tools

Edit, merge, split, compress, rotate, and sign PDFs in this browser. Files are not uploaded. These pages do not convert Office documents or remove passwords.

What you can do here

To change words, cover the old text and add new text. Merge and split copy pages. Compress redraws pages as pictures, so keep the original if you still need to select text.

What these pages do not do

A signature stamp is an image you drew. It is not a certificate. Password-protected files are refused.

Tools in this category

Edit PDF

Cover text and add words, highlights, boxes, or drawings to a PDF in this browser.

Merge PDF

Combine PDF files into one document without uploading them.

Split PDF

Extract a page range or save every PDF page as its own file.

Compress PDF

Redraw PDF pages as JPEGs and compare the new file size before you download.

Sign PDF

Draw a signature and stamp it onto a PDF page. This is an image, not a certificate.

JPG to PDF

Turn JPG and PNG pictures into a PDF, one image per page.

PDF to JPG

Render each PDF page as a JPEG and download them in a zip.

Rotate PDF

Turn every PDF page 90, 180, or 270 degrees.

Organize PDF

Reorder or delete PDF pages, then download the new file.

Watermark PDF

Stamp diagonal text such as DRAFT across every PDF page.

PDF Page Numbers

Add a page number at the bottom of each PDF page.

Crop PDF

Trim the same margin, in points, off every edge of a PDF.

Frequently asked questions

Can I edit the words already in a PDF?

Cover the old words with a white box, then add new text. PDF pages are drawings, so the original letters are not a text cursor you can retype.

Are my PDFs uploaded?

No. These tools run in your browser after the page loads. Closing the tab discards the file.

Can you unlock a password-protected PDF?

No. Open the file in the app that created it, remove the password there, and then use these tools.

Merge, split, compress, rotate, sign, and edit PDFs in your browser. Files stay on this device. No Word conversion or password unlock. Open a tool and download.

What this page covers

PDF Tools is a Case Modify collection page that groups related browser tools and guides into one canonical hub.

Quick answer

Merge, split, compress, rotate, sign, and edit PDFs in your browser. Files stay on this device. No Word conversion or password unlock. Open a tool and download.

Edit, merge, split, and compress in the browser

Cover old PDF text and add new text, highlights, or drawings. Merge and split copy pages. Compress redraws pages as pictures. Sign stamps a drawing you made. Files are not uploaded.

What these tools do not do

They do not convert Word, Excel, or PowerPoint, and they do not read text from a scan. Password-protected PDFs are refused. A signature stamp is not a certificate.

Keep the original

Cropping hides edges rather than securely deleting them. Compression drops selectable text. Download a new file and keep the source if you still need it.

Related Tools

How to use this tool

  1. Choose the specific page in PDF Tools that matches your intent.
  2. Open the canonical tool or guide for the focused task.
  3. Use the related links to compare adjacent converters, examples, and explanations.

Getting started

Merge, split, compress, rotate, sign, and edit PDFs in your browser. Files stay on this device. No Word conversion or password unlock. Open a tool and download.

Topics this page helps with

People usually land here when searching for PDF Tools, Case Modify, free online tools. PDF Tools is designed for quick copy-paste workflows: paste input, review the preview, then copy or download the result.

Privacy and local processing

PDF Tools runs in your browser on Case Modify. Typical conversions do not upload your pasted text to our servers for processing.

You still share data with your browser vendor and network as with any website; see our privacy policy for analytics and ads. When you work with secrets, credentials, or personal data, review the output locally before you publish or send it.

Details: privacy policy.

Before you publish

Unicode styling, formatted code, and converted units can look correct in the preview but fail in the target app because of font support, line breaks, or platform limits.

Test a short sample in the destination (bio field, IDE, CMS, or spreadsheet) before you paste a long block.

Workflow tips: how Case Modify works, documentation hub.

Limits to keep in mind

Free browser utilities excel at quick edits, classroom exercises, and copy-paste formatting. They are not a replacement for licensed design software, production build pipelines, or compliance review.

When a platform rejects styled Unicode, fall back to plain ASCII from a case converter or remove formatting before you submit final copy.

Frequently asked questions

Can I edit the words already in a PDF?

Cover the old words with a white box, then add new text. PDF pages are drawings, so the original letters are not a text cursor you can retype.

Are my PDFs uploaded?

No. These tools run in your browser after the page loads. Closing the tab discards the file.

Can you unlock a password-protected PDF?

No. Open the file in the app that created it, remove the password there, and then use these tools.

Uppercase Converter: Turn any text into UPPERCASE instantly.

Bold Text Generator: Create bold-looking text with Unicode—works in bios, captions, DMs, and Discord without HTML.

Unicode Text Converter: Find special characters for math, arrows, and emoji-related symbols.

All Text Tools: All Text Tools

Explore Case Modify

Case Modify publishes free browser-based text converters, code formatters, encoders, random generators, and unit calculators. Each page runs locally after load unless a tool page states otherwise.

  • Case converters hubTitle case, sentence case, uppercase, lowercase, camelCase, PascalCase, snake_case, and kebab-case tools.
  • Code formatters hubJSON, HTML, CSS, JavaScript, XML, YAML, Markdown, GraphQL, TypeScript, and SCSS formatters.
  • JSON tools hubFormat, minify, escape, stringify, and edit JSON in the browser.
  • Text utilities hubFind and replace, duplicate line removal, sorting, encoding, and cleanup utilities.
  • Unit converters hubLength, weight, temperature, time, volume, area, energy, and related conversion calculators.
  • Unicode font styles hubBold, italic, bubble, aesthetic, and platform-specific Unicode text generators.
  • Random generators hubRandom numbers, letters, passwords, UUIDs, dates, and related generators.
  • Case Modify blogGuides on title case, camelCase, JSON formatting, and developer naming conventions.

Machine-readable summaries: llms.txt, llms-full.txt, agents.txt.