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Popular tools
The highest-demand tools with full options — browse by category below for the rest.
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. Honest limits worth knowing: Compress PDF flattens each page to a re-encoded image (great for scans, not ideal if you need selectable text after); HEIC conversion depends on your browser (Safari usually works; Chrome often cannot decode HEIC without a library we don't ship); Fill PDF Form is best-effort for simple AcroForm fields, not a full Adobe Forms replacement; and Word/Excel/PowerPoint ⇄ PDF genuinely needs a server-side engine, so it isn't included — 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
Watermark PDF stamps CONFIDENTIAL, DRAFT, or a logo across pages with live preview — opacity, rotation, tiling, and above/behind layering included.
How Watermark PDF works here
Watermark PDF runs locally in your browser on TechDriven Tools. Inputs stay on your device — nothing is uploaded for this step.
Read every label before running. For Watermark PDF, the controls that change outcomes most are: presets (CONFIDENTIAL/DRAFT/…), Text vs Image/Logo, opacity, rotation, tiled mode, Behind content, position grid, {date}/{page} placeholders. Change one control at a time when you are comparing results.
When to use it
Use Watermark PDF when the job matches what the tool is named for — not as a generic substitute for unrelated PDF or data tasks.
Prefer this browser version when the input is sensitive and you want processing to stay on-device with clear option names like: presets (CONFIDENTIAL/DRAFT/…), Text vs Image/Logo, opacity, rotation, tiled mode, Behind content, position grid, {date}/{page} placeholders.
If the next step differs (for example you finished and now need a sibling utility), jump to a related tool instead of forcing one screen to do everything.
Teams standardize on Watermark PDF when the alternative is emailing files to a consumer upload site. Document the preferred option defaults (for example the usual quality, corner, or rate) so everyone reproduces the same result.
If Watermark PDF is only one step in a pipeline, write the order down: what happens before, what happens after, and which related tool owns each step. That prevents double-processing and accidental quality loss.
On mobile, prefer moderate file sizes and simpler option combinations. Local processing is powerful, but phones have less memory than desktops for huge scans or megapixel images.
Mark drafts before review. Stamp DRAFT or CONFIDENTIAL with a preset so reviewers never confuse a working copy with a final.
Brand client PDFs. Switch to Image/Logo mode and tile a light logo so every page carries ownership.
Void mistaken invoices. Use VOID preset at stronger opacity so a wrong PDF cannot be reused quietly.
Options that change the result
Primary controls
The important controls are: presets (CONFIDENTIAL/DRAFT/…), Text vs Image/Logo, opacity, rotation, tiled mode, Behind content, position grid, {date}/{page} placeholders. Change one at a time when comparing outcomes so you know what improved the result.
Run and verify
After you run Watermark PDF, open or inspect the output on the device where you will share it. Keep originals until that check passes.
Boundaries
This page does not replace desktop suites for heavy Office conversion or certified legal e-sign. It covers the focused job described above.
Practical defaults
Start with conservative defaults on Watermark PDF, run once, then adjust. Extreme settings (lowest quality, highest tip, densest QR payload) are for known constraints — not first tries.
Inputs that surprise people
People often misread units or page indexes. Align with the on-screen labels and the total page count or unit selectors before blaming the engine.
Outputs and naming
Rename downloads immediately (date + client + purpose). Watermark PDF may use a generic filename; clear names prevent sending yesterday’s draft.
Accessibility and sharing
After visual tools (watermark/sign/page numbers), skim a page with fresh eyes for contrast and coverage. After data tools, copy results into the system of record your team actually uses.
Privacy
Watermark PDF is designed to run in your browser so your files and text are not uploaded for the core transformation.
Still handle downloads carefully: a private process can still leave sensitive files in your Downloads folder.
Optional accounts on TechDriven Tools, when used, are about lightweight usage metadata — not storing the contents of your Watermark PDF inputs.
If policy requires a vendor DPIA for any online tool, note that local browser processing reduces data transfer risk, but downloaded artifacts still need handling under your retention rules.
Watermark PDF is built to process locally in your browser so sensitive PDFs, images, or text do not need to be uploaded to an unknown server just to finish this job.
Common mistakes
- Opacity too high — Text underneath becomes unreadable — live preview exists for a reason.
- Forgetting tiled mode when screenshot risk is high — A single diagonal mark crops out easily; tiling does not.
- Using watermark as encryption — A stamp is not Protect PDF; it does not stop editing or copying.
Getting reliable results from Watermark PDF
Most failures with Watermark PDF are input/setting issues rather than mysterious bugs: wrong units, wrong page lists, wrong language, or expecting one tool to do a sibling’s job. Re-read the option names, fix the input, and re-run — local tools make iteration cheap.
Watermark PDF accelerates the workflow; it does not replace your judgment or professional advice where required.
Related tools
These related tools commonly sit before or after Watermark PDF in real workflows.
- Merge PDF — Combine several PDFs into one, in the order you choose.
- Sign PDF — Draw, upload, or type a signature — click the preview to place.
- Add Image to PDF — Stamp a logo, photo, or scanned signature onto any page.
Use Watermark PDF when you need this specific job done privately and quickly. Respect what it is not (see mistakes), verify outputs, and chain related tools only when the next step truly differs.
Start from Watermark PDF.
If you arrived from search looking for Watermark PDF, bookmark the tool page itself after this guide — the article exists to teach options and pitfalls, not to replace the working UI.
From our blog: How to Add a Watermark to a PDF