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Your Digital Toolbox 30+ free online tools

Free online tools for developers, creators and everyday work — JSON and diff utilities, image privacy, SVG converters, calculators, Base64 and more. Most run entirely in your browser, nothing uploaded.

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Tools by topic

Each topic groups related tools with a short guide on why they exist and what you can do.

Protect Your Images Before You Share Them

A complete, browser-only workflow: strip hidden metadata, hide sensitive details, watermark your work, and optimize for the destination. No image ever leaves your device.

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EXIF Viewer & Metadata Remover

Inspect photo metadata such as GPS, capture time and camera details, then remove supported embedded metadata without uploading the files.

Image Redactor — Hide Sensitive Details

Cover private details in screenshots with solid boxes, blur or pixelation. Preview the image and export a copy in your browser.

Add Watermark to Images

Add visible text watermarks to images, adjust their appearance and placement, then preview and download the result locally.

Image Guard — Pixel Effects & Watermarks

Apply built-in pixel perturbations, patterned noise and watermark effects to images in your browser, then preview and download PNG copies.

Image Compressor — JPG, PNG & WebP

Reduce image file size with quality controls or a target-size setting. Compare results and download images individually or as a ZIP.

Image Resizer — Pixels & Presets

Resize images to chosen pixel dimensions or platform presets, preview the result and download the resized files in your browser.

Image Converter — PNG, JPG & WebP

Convert images between PNG, JPG and WebP in your browser. Choose the output format and download individual files or a ZIP.

Grid & Drawing Tools

Master proportions, perspective and sketch scaling with professional online grid tools. Overlay reference grids, generate printable sheets, and analyze tonal values — 100% in your browser.

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Drawing Grid Maker

Overlay an adjustable grid on a reference photo and export a gridded image to help transfer proportions to paper or canvas.

Photo to Coloring Page

Turn a photo into a line-art coloring reference using edge and detail controls. Preview and export the result for coloring practice.

Paint by Number from Photo

Reduce a photo to a color palette and numbered regions. Export a painting guide and color reference for a custom practice project.

Perspective Grid Generator

Create one-, two- or three-point and isometric perspective guides. Adjust the horizon and vanishing points, then export a reference for sketching.

Grid Drawing Worksheet Maker

Create a printable grid-copy worksheet from a reference image, with a matching blank practice grid for drawing exercises.

Canvas Size & Grid Calculator

Compare reference-image and canvas aspect ratios and calculate physical grid cell sizes in cm, inches or mm before transferring a drawing.

SVG Tools

Convert SVG files and SVG code into raster images and PNG — for social posts, docs and email where SVG isn't supported. Runs in your browser.

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SVG to Image Converter

Render an SVG file as a raster image with a chosen output format and pixel size. Preview the result before downloading.

SVG to PNG Converter

Convert an SVG file to a PNG image at a chosen pixel size. Preview the rendered artwork for websites, documents or icons.

SVG Code to Image Converter

Paste SVG markup, preview the artwork and export a raster image at a chosen size without creating an SVG file first.

SVG to Code Viewer

Open an SVG file, inspect its markup and copy the code for an icon, illustration or web component.

Developer Tools

The small utilities developers reach for every day — format and validate JSON, diff payloads, decode timestamps, inspect URL metadata. No signup, no install.

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JSON Formatter & Minifier

Format or minify JSON and locate syntax errors by line and column. Clean up API responses and configuration files in your browser.

Unix Timestamp Converter

Convert Unix timestamps to dates and back, with seconds, milliseconds and selectable time zones. Check log entries and API timestamps in your browser.

JSON Diff — Compare JSON Objects

Compare two API responses or configuration files. See added, removed and changed values in side-by-side, tree or table views.

Text Diff — Compare Text Online

Compare two text blocks side by side to spot added, deleted and changed content when reviewing drafts or configuration text.

Meta Tag Fetcher for Chrome

Inspect page titles, descriptions and Open Graph tags with the Chrome extension. Map fields and export metadata for content reviews.

SQL to Table Converter

Turn CREATE TABLE and INSERT INTO statements into readable tables, then export parsed data as CSV or JSON in your browser.

URL Metadata Extractor

Fetch titles, descriptions and Open Graph metadata from URLs. Review multiple links and copy the fields needed for a content inventory.

JSON Validator & Syntax Checker

Check JSON syntax and locate errors by line and column. Inspect valid data in a tree view before using it in an API or configuration file.

Telegram Chat ID Finder

Use a bot token to read recent Telegram bot updates and copy the chat IDs needed for bot notifications or integrations.

Invisible Character Remover

Find and remove zero-width spaces, soft hyphens and Unicode control characters from copied text. Inspect hidden characters before copying or downloading the result.

Productivity Tools

Small time utilities — a full calendar, world clock, year progress, countdown to a date, and a kanban board. Open in a tab, get your answer in a glance.

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Year Calendar

Browse all twelve months of a selected year and check which weekday a date falls on. Switch years to plan schedules.

Online Clock & World Time

View a digital clock, add time zones and use fullscreen display when coordinating meetings or keeping time visible.

Online Analog Clock

Read hours, minutes and seconds on an analog dial. Change its theme or time zone for a desk display or time-reading practice.

Time Progress — Day, Month & Year

See how much of the day, month and year has elapsed. Use progress bars to put daily plans and longer-term goals in context.

Online Countdown Timer

Set hours, minutes and seconds, then start, pause or reset a countdown for focused work, cooking or short activities.

Personal Kanban Board

Organize tasks into To Do, Doing and Done. Move cards between columns and keep a personal workflow in your browser.

Base64 Tools

Encode and decode Base64, convert between Base64 and images or audio, and turn images into Base64 data URIs. Runs entirely in your browser.

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Base64 Encoder & Decoder

Encode text as Base64 or decode a Base64 string to inspect a payload. Copy the result directly from your browser.

Base64 to Audio Decoder

Decode Base64 audio data, preview it with the browser player and download the recovered bytes for testing audio payloads.

Base64 to Image Decoder

Paste Base64 image data or a data URI, preview the image and download it when checking API responses or embedded assets.

Image to Base64 Encoder

Encode an image as a Base64 string or data URI. Choose output settings, preview the image and copy the result for HTML or API payloads.

Calculator Tools

Everyday calculators — percentages, certificate of deposit interest, overtime and time-and-a-half pay, BMI, and cat age. Quick answers, no signup.

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Percentage Calculator

Calculate a part as a percentage of a total, percentage increases or decreases, and change between two values.

CD Interest Calculator

Estimate a certificate of deposit balance and interest from the deposit, entered annual rate, term and compounding frequency.

Time and a Half Pay Calculator

Estimate pay from hourly rates and hours worked, including 1.5×, 2× or 3× overtime scenarios.

BMI Calculator

Calculate body mass index from height and weight using metric or imperial units, and view the displayed BMI range.

Cat Age to Human Years Calculator

Estimate a cat’s age in human years and view an approximate life stage to understand the age comparison.