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PDF Image Stamp — Drop a PDF and an image (PNG or JPEG) — the image is overlaid on each page at the position, size and opacity you choose. Great for add...

PDF Visual Signer — The richest PDF signing flow on TextTools — upload your PDF, see each page rendered live, click or drag a rectangle to choose where ...

PDF Text Stamp — Add a preset (APPROVED, DRAFT, CONFIDENTIAL, REVIEWED, PAID, VOID, ORIGINAL, COPY, URGENT) or custom text stamp across every page — box...

Base32 / Base58 Encoder & Decoder — Encode and decode Base32 (RFC 4648), Base32-hex, and Base58 (Bitcoin / IPFS). Sister tools to our Base64 encoder.

Unix Timestamp Converter — Convert between Unix timestamps and human-readable dates instantly. See the current epoch time and convert any timestamp to a...

UTM Builder — Build UTM tracking URLs for your marketing campaigns. Enter your campaign details and get a properly formatted URL with all UTM parameters.

YouTube Timestamp Link Generator — Enter a YouTube video URL and a timestamp to generate links that start playback at that exact moment. Get watch links...

Free online Ohm's Law calculator. Calculate voltage (volts), current (amps), resistance (ohms), and power (watts) with any two known values.

Free online electricity cost calculator. Estimate daily, monthly, and yearly power consumption in kWh and calculate energy bills based on your local.

AC Power Calculator — Calculate single and three-phase AC electrical power parameters, including Watts, Volt-Amperes, and Amps.

Battery Run Time Calculator — Estimate how long your battery will last under a specific electrical load, accounting for battery chemistry and discharge ...