Every file you touch here stays on your machine.
PDF, image, developer, SEO, text, student and business tools — all free, all entirely in your browser. No upload, no account, no server ever sees your data.
The toolset
Focused tools covering the everyday PDF work — pick one to get started, no account needed.
How this actually works
Each tool runs entirely with JavaScript already loaded in this page — PDF tools via pdf-lib and pdf.js, image tools via the browser's native Canvas API, and everything else with plain JavaScript. Your files or input are read into browser memory, processed, and handed back as a download or copyable result. This page itself is served by a small Laravel route; Laravel never sees your files either. The only backend in use is Supabase, and only for two optional things: signing in with a magic link, and — only if you're signed in — a log of which tool you ran and when. Two things have real limits worth knowing up front: Compress PDF flattens each page to a re-encoded image (great for scan-heavy PDFs, not ideal if you need selectable text after), and Word/Excel/PowerPoint ⇄ PDF conversion genuinely requires a server-side rendering engine, so it isn't included here — this build only ships tools that can honestly run client-side.
Questions people actually ask
Can I control the watermark's opacity and angle?
Yes — set the opacity and rotation with sliders, or pick a rotation preset, and watch the live preview update as you go.
Does the watermark apply to every page?
By default, yes — but you can limit it to just the first page, the last page, odd or even pages, or a custom range like 1-3, 7.
Can I use my own logo instead of text?
Yes — switch to "Image / Logo" mode and upload a PNG or JPG. It scales to a percentage of the page width you choose.
Can the watermark repeat across the whole page instead of appearing once?
Yes — enable tiled mode and it repeats in a grid pattern with adjustable spacing, which is also harder to crop out than a single mark.
What are the preset templates?
One-click buttons for CONFIDENTIAL, DRAFT, COPY, SAMPLE, APPROVED, PAID, VOID, INTERNAL, and REVIEWED — each sets a sensible color, rotation, and opacity, which you can still adjust afterward.
Can I place the watermark behind the existing page content instead of on top?
Yes — the "Behind content" layer option draws the watermark first and the original page on top, so it shows through without covering existing text or images.
Can the watermark text include the date or page number automatically?
Yes — use {date}, {time}, {page}, {totalpages}, or {filename} in the text field and each is substituted per page when the file is generated.
What fonts and colors are available?
Helvetica, Times Roman, and Courier, each with bold and italic variants, plus a full color picker with hex input and your recently-used colors saved for reuse.
Where can I position the watermark on the page?
Any of 9 positions — the four corners, the four edge midpoints, or dead center — chosen from a visual grid.
Does watermarking reduce image or text quality?
No — the original page content is untouched; the watermark is added as a new layer, whether above or behind it.
Can I preview the result before downloading?
Yes — a live preview of page one updates instantly as you change text, color, position, rotation, or opacity, with its own zoom control.
Is this really free, and is there a file size limit?
Yes — no account, no paywall. Since processing happens in your browser's memory rather than uploading anywhere, the practical limit is your device's available RAM, not a server quota. Very large files (500+ pages) may run slower, especially for Compress and PDF→JPG.
Does anything about my file get sent anywhere?
No. Every tool runs with pdf-lib/pdf.js loaded in this page; your file is read into browser memory and never leaves it. The only network call this app makes for your account is Supabase auth — and that only stores which tool you ran and when, never file content.
Why isn't Word/Excel/PowerPoint → PDF included?
Converting Office formats accurately needs a real rendering engine (what Word or LibreOffice use internally) — no browser library does this reliably. Rather than ship a broken version, it's left out.
Does TechDriven Tools have OCR (text recognition)?
Yes — OCR PDF recognizes text in scanned or photographed pages using Tesseract.js, running entirely on your device, and gives you a searchable PDF or a plain text file. Nothing is uploaded for this either.
Can I use this without an internet connection?
Once the page and its libraries have loaded once, yes — the tools themselves need no network access. Signing in and viewing history do require a connection, since those talk to Supabase.
What happens to the "history" if I sign in?
Only a row per tool run — the tool's name and a timestamp. No filename, no file content, ever. You can see the full list any time via the History button.
Are the non-PDF utilities (password generator, JSON formatter, etc.) private too?
Yes — same rule as the PDF tools. Word Counter, Case Converter, Password Generator, UUID Generator, Base64, Hash Generator, JSON Formatter and JWT Decoder all run with plain JavaScript already loaded in this page; nothing you type or paste is sent anywhere.
Watermark PDF, in depth
100% free, browser-only, no registration, works on mobile, text or image watermarks.
Features
Live Preview
See exactly how the watermark will look before you run it, with zoom controls.
9-Point Placement
Pin the watermark to any corner, edge, or the center of the page.
Tiled Mode
Repeat the watermark in a grid across the whole page instead of once.
Text or Image
Stamp a text watermark or upload your own logo (PNG/JPG).
Above or Behind Content
Layer the watermark on top of the page, or tuck it behind the existing content.
Page Selection
Apply to every page, just the first or last, odd/even, or a custom range.
Ready-Made Presets
CONFIDENTIAL, DRAFT, COPY, SAMPLE, APPROVED, PAID, VOID, INTERNAL, REVIEWED — one click each.
Dynamic Text
Insert {date}, {time}, {page}, {totalpages}, or {filename} — substituted automatically per page.
Why use Watermark PDF
- Mark drafts clearly so a work-in-progress version is never mistaken for the final one.
- Protect shared documents with a visible CONFIDENTIAL or INTERNAL stamp before sending them outside your team.
- Brand a document by stamping your own logo across every page.
- Track document status with an APPROVED, PAID, or VOID mark that's obvious at a glance.
- Discourage unauthorized copying with a tiled watermark that's harder to crop out of every page.
- Date-stamp a batch of documents automatically using the {date} placeholder instead of typing it into each one.
Supported uses
Draft Contracts & Reports
Confidential Business Documents
Branded Client Deliverables
Sample & Preview Copies
Invoices & Payment Records
Internal-Only Documentation
How TechDriven Tools compares
| Feature | TechDriven Tools | Other Online Tools | Desktop Software | Command-Line Tools |
|---|---|---|---|---|
| Speed | Instant, no upload | Depends on upload speed | Depends on install | Instant, but needs setup |
| Privacy | Never leaves your device | Varies — check the site's policy | Local, but often needs install/updates | Local, fully offline |
| Installation | None — runs in browser | None | Download & install required | Requires tools installed first |
| Mobile-friendly | Yes | Varies by site | No | No |
| Free | Always | Often freemium / capped | Often paid | Free, but not beginner-friendly |
| Live preview | Yes | Varies by site | Yes | No |
| Tiled & image watermarks | Yes | Varies by site | Yes | Varies |
Privacy
- Files are never stored — nothing is written to a server, ever.
- All processing happens in your browser, using pdf-lib.
- No registration or account required to use any of this.
- Nothing is transmitted, so there's nothing in transit to intercept.
- Downloads come straight from your browser's own memory to your device.
What is a PDF Watermark
A watermark is text or an image stamped onto a page, usually semi-transparent, to convey status (DRAFT, CONFIDENTIAL, APPROVED), ownership (a logo or copyright line), or authenticity (a sample or void mark). Unlike an editable annotation, once it's applied and the file is saved, the watermark becomes part of the page content itself.
Benefits
A watermark communicates something about a document at a glance, without anyone needing to open a cover email or read a header note. A DRAFT stamp keeps an in-progress version from being treated as final. A CONFIDENTIAL stamp is a visible reminder before a document gets forwarded further than intended. A logo stamped across a set of client deliverables reinforces branding on every page, not just the cover.
Best Practices for Watermarking
- Keep opacity low (15–30%) for a watermark that should stay in the background — readable but not distracting from the actual content.
- Use the behind content layer option when the watermark shouldn't visually cover existing text or images, such as a subtle brand mark under a report's body text.
- Use tiled mode for documents likely to be photographed, screenshotted, or cropped — a single diagonal watermark is easy to crop out; a full-page tile isn't.
- Preview at 100% zoom before running the tool on a large batch of pages — the live preview reflects the exact position, rotation, and opacity that will be applied.
Common Mistakes
The most common mistake is picking an opacity too high, which makes the underlying text hard to read — a watermark works best when it's clearly visible but doesn't fight the actual content for attention. The second is applying a watermark to every page of a document where only a cover page or a specific section needed one; the page-selection options (first, last, a custom range) exist specifically to avoid that.
Text vs. Image Watermarks
A text watermark is faster to set up and works well for status marks (DRAFT, CONFIDENTIAL) or short dynamic labels using the date/page placeholders. An image watermark is the right choice for an actual logo or brand mark, since it can't be represented as text. Both support the same placement, rotation, opacity, tiling, and layering controls.
Security
Since the file is read directly into your browser's memory and never uploaded, watermarking a confidential contract, a financial statement, or an unreleased document never means trusting a server with it first — the watermark is added and the file is saved without it ever leaving your device.
Mobile Watermarking
The position grid, sliders, and preset buttons are all touch-sized, and the live preview updates the same way on a phone as on a laptop — there's no need for a desktop app just to stamp a document before sending it from a phone.
Business and Education Use Cases
In an office, this covers marking draft contracts before internal review, stamping CONFIDENTIAL across a document shared with an external partner, or branding a set of client deliverables with a company logo. In education, it's marking a sample answer key as SAMPLE before distributing it, or stamping a course handout as INTERNAL when it isn't meant to circulate beyond the class.