The honest PDF blog
No SEO-spam content farms. Long, useful posts on getting more out of PDFs, written by the team that built the tools.
How to prep documents and text for ChatGPT and Claude, free and in your browser
Cleaning, counting, chunking and scrubbing text before you paste it into an LLM saves money and protects your data. Here's a free, browser-only workflow that never uploads a thing.
How to count LLM tokens for free, and stop overpaying for API calls
Tokens, not words, decide what an LLM costs and whether your text fits. Here's how to count GPT tokens exactly, estimate cost per model, and trim or split text when it doesn't fit, all in your browser.
Remove personal data before pasting into ChatGPT or Claude
Pasting logs, emails or spreadsheets into an LLM can leak names, card numbers, API keys and more. Here's how to redact PII automatically, in your browser, before any of it leaves your machine.
How to chunk text for RAG the right way (size, overlap and boundaries)
Good retrieval starts with good chunks. Here's how to pick a chunk size and overlap, why sentence boundaries beat fixed windows, and a free browser tool that does it with exact token counts.
Free OCR with no upload: read text from any screenshot or scan
Most free OCR sites upload your image to a server. Here's how to extract text from screenshots, scans and photos entirely in your browser, where the image never leaves your device.
How to compress a PDF for WhatsApp, under the 100MB cap, fast
WhatsApp caps document attachments at 100MB. Most quotation PDFs, scanned bills, and student notes from camera apps blow past that easily. Here's how to get under the limit without losing readability, entirely in your browser.
How to redact a PDF in your browser, without uploading sensitive data
Redacting bank statements, ID scans, or contracts on a server you don't control is the privacy version of asking a stranger to hold your wallet. Here's the browser-only alternative, pattern-detect emails / SSNs / cards or paint black bars manually.
How to resize PDF pages, A4 to Letter, Letter to A5, in a click
A doc on US Letter (8.5×11) often prints crookedly on European A4, and vice versa. Here's how to rescale every page to the correct size, preserving the original quality, browser-only.
How to convert image to PDF on iPhone, Android, and laptop, no app needed
Every phone now has a built-in PDF export. Here's the fastest path on iPhone, Android, and on a laptop without installing anything, plus when to use a browser-only converter instead.
The best free regex tester in 2026, no signup, runs in your browser
Regex101 is great until you hit the daily limit, RegExr's UI hasn't shifted in a decade, and most others bury you in ads. Here's a clean, fast, browser-only alternative, plus 12 ready-made patterns including Indian PAN, GSTIN, and credit cards.
Convert CSV to JSON online in 2026, without uploading your data
Most CSV-to-JSON tools ask you to upload, then sit on your data 'for processing'. For a 10MB customer export with PII, that's not OK. Here's how to do the conversion entirely in your browser, RFC 4180 compliant, type-coercion optional.
How to convert PDF to Word for free, no signup, no email, no upload
Every 'free PDF to Word' tool seems to want your email or a signup. Here's how to do it without either, plus the privacy trade-offs of the popular options.
How to extract pages from a PDF without uploading the whole document
Sometimes you only need pages 3–7 of a 200-page PDF. Here's how to extract them entirely in your browser, no upload, no waiting on a server, no Acrobat license.
How to compress a PDF to 100KB, without losing readability
Most online forms cap PDF uploads at 100KB, 200KB, or 1MB. Here's how to actually hit those targets while keeping the document legible, and what to do when you can't.
How to invert PDF colors, for dark-mode reading and ink-saving prints
White-on-black is easier on the eyes for long reading sessions and saves ink when printing on dark paper. Here's how to invert PDF colors in your browser with zero upload.
How to add a blank page to a PDF, anywhere, free, no upload
Insert blank pages into a PDF for duplex printing, workbook spacing, or chapter dividers. Browser-only, three clicks, page size matches automatically.
How to merge PDFs without uploading them anywhere
Most PDF mergers upload your files to a server. Here is how to combine PDFs entirely in your browser, with no uploads, and why it matters.
How to compress a PDF to 100KB without ruining quality
A practical guide to PDF compression: what actually shrinks files, the tradeoffs, and a free browser-only tool that does it well.
How to sign a PDF without DocuSign, free alternatives in 2026
DocuSign and Adobe Sign charge per envelope. Here is how to sign PDFs for free, and when an electronic signature is legally enough.
iLovePDF alternatives: 6 better options for 2026
iLovePDF dominates the PDF tool category but is showing its age. Here are six alternatives that beat it on speed, privacy, or design.