Document Processing Tools
Free tools for working with documents and data. Process PDFs, clean CSV files, format JSON, and compare two texts side by side, all in your browser with complete privacy.
PDF Tools
Split and merge PDF files instantly. Combine multiple PDFs into one or extract specific pages. All processing happens in your browser. Your files never leave your device.
CSV Cleaner
Clean and format CSV files with ease. Remove duplicates, filter rows, sort data, and export clean CSV. Perfect for data analysts and anyone working with spreadsheets.
JSON Formatter
Format, validate, and beautify JSON data online. Check syntax errors, minify for production, or beautify for readability. Essential tool for developers working with APIs.
Compare Two Texts
Paste two texts and see every difference highlighted side by side. Line, word, or character compare in your browser.
Why Use Our Document Tools?
100% Private
All processing happens in your browser. Your documents never leave your device. No uploads to servers.
Lightning Fast
No waiting for uploads or processing queues. Work with your documents and data instantly.
No Limitations
Process files of any size, unlimited operations, no watermarks, no forced sign-ups.
Common Use Cases
PDF Processing
- • Merge multiple invoices or receipts
- • Extract pages from reports
- • Combine documents for printing
Data Cleaning
- • Remove duplicate entries from lists
- • Filter customer data by criteria
- • Sort and organize spreadsheets
JSON Validation
- • Debug API responses
- • Format configuration files
- • Validate JSON syntax before deployment
Text Comparison
- • Compare contract versions
- • Review code changes
- • Check document revisions
Frequently Asked Questions
Are PDF and CSV tools really private?
Yes. PDF Tools (merge and split, via pdf-lib), CSV Cleaner, JSON Formatter, and Text Diff all run entirely as JavaScript inside your browser tab; there is no upload step, no server-side processing, and no third-party API call for any of the four. Your PDFs, spreadsheets, JSON payloads, and pasted text stay on your device from start to finish, which also means these tools keep working without an internet connection once the page has loaded, and there's no risk of a contract, financial statement, or internal document ever touching Instant Tools infrastructure. This is different from the AI-powered tools elsewhere on the site, which do send content to an AI provider for analysis; nothing in the Document Tools hub does that.
Text Diff vs Prompt Diff: which should I use?
Both use the same Myers diff algorithm, the line-diff engine behind Git, but they're tuned for different content. Text Diff is the general-purpose choice: paste any two blocks of plain text, code, or config, and compare them in split or unified view with added/removed line stats and copyable unified-diff output, ideal for code review snippets or contract redlines. Prompt Diff is purpose-built for AI agent context files, system prompts, AGENTS.md, CLAUDE.md, and Cursor .mdc rules, and adds word-level highlighting on top of line diffs, which matters because a single-word change inside a long prompt line is easy to miss in a plain line diff but jumps out immediately with word-level highlighting. If you're iterating on an agent's instructions, use Prompt Diff; for everything else, Text Diff.
Is there a file size limit?
There's no limit enforced by Instant Tools; the practical ceiling is your device's available memory, since every one of these tools loads the full file into browser memory to process it. Most modern browsers handle PDFs and CSVs comfortably up to a few hundred megabytes without trouble, and JSON Formatter and Text Diff handle multi-megabyte text easily since text is far lighter than binary PDF data. If you're working with a very large PDF (thousands of pages) or a CSV in the gigabyte range, expect the browser tab to slow down or, in extreme cases, run out of memory; splitting the file into smaller chunks first, or working on a desktop browser with more available RAM than a phone, resolves that.
Do I need an account?
No. None of the four Document Tools, PDF Tools, CSV Cleaner, JSON Formatter, or Text Diff, require registration, an email address, or a login of any kind; you open the page and start working immediately. There's also no usage cap tied to an account, since there's no account to attach a cap to: merge as many PDFs, clean as many CSVs, or run as many diffs as you need in a session, for free, with no daily limit. This is consistent with every non-AI tool on Instant Tools, which are all local, browser-only utilities rather than metered services, so there's simply nothing on the server side to gate behind a signup.