FREE BROWSER TOOLS
Free online tools that just work
No signup. No install. No tracking. Everything runs in your browser — private by default.
49 tools · most-used first
Free developer tools
Format JSON and SQL, convert YAML and CSV, test regex and cron, decode JWTs, count AI tokens and more, all in your browser.
⟷★ Popular
Diff Checker
Compare two blocks of text and highlight every difference side by side. No login, no file size limit.
DeveloperFree · no sign-up
{ }★ Popular
JSON Formatter
Format, validate and beautify JSON data with syntax highlighting. Paste messy JSON, get clean indented output instantly.
DeveloperFree · no sign-up
64★ Popular
Base64 Encoder / Decoder
Encode any text to Base64 or decode Base64 strings back to plain text. Runs entirely in your browser.
DeveloperFree · no sign-up
🪪Developer
UUID Generator
Generate RFC-compliant v4 UUIDs instantly. Bulk-generate up to 100 at once — copy to clipboard in one click.
DeveloperFree · no sign-up
.*Developer
Regex Tester
Test regular expressions with live highlighting, capture groups and replace preview.
DeveloperFree · no sign-up
⇢Developer
JSON to CSV
Turn a JSON array into CSV for Excel or Google Sheets. Nested objects become columns.
DeveloperFree · no sign-up
⌗Developer
SQL Formatter
Format SQL for PostgreSQL, MySQL, SQL Server, SQLite, BigQuery and more.
DeveloperFree · no sign-up
⏱Developer
Unix Timestamp Converter
Convert epoch time to dates and back, in seconds or milliseconds, plus Discord timestamp codes.
DeveloperFree · no sign-up
YDeveloper
YAML to JSON
Convert YAML to JSON or JSON back to YAML as you type, with clear error messages.
DeveloperFree · no sign-up
⇠Developer
CSV to JSON
Convert CSV to JSON with header detection, quoted values and number detection.
DeveloperFree · no sign-up
🎟Developer
JWT Decoder
Decode a JWT header and payload and see when it expires. Token stays in your browser.
DeveloperFree · no sign-up
🔢Developer
AI Token Counter
Count tokens for GPT models exactly, with estimates for Claude and Gemini. Text stays in your browser.
DeveloperFree · no sign-up
64Developer
Image to Base64
Encode images as Base64 data URLs, or decode Base64 back to an image.
DeveloperFree · no sign-up
⏰Developer
Cron Expression Generator
Explain a cron schedule in plain English and see its next run times.
DeveloperFree · no sign-up
$Developer
AI API Cost Calculator
Estimate LLM API costs from tokens and price per million tokens.
DeveloperFree · no sign-up
Free image & design tools
Compress, resize and convert images, make favicons, pull colour palettes from photos and convert colours.
↔Design
Image Resizer
Resize images to exact pixels, percentages or social media sizes.
DesignFree · no sign-up
🗜Design
Image Compressor
Compress JPG, PNG and WebP images by quality or to a target size like 100 KB. Nothing is uploaded.
DesignFree · no sign-up
🎨Design
Color Converter
Convert between HEX, RGB, HSL and CSS color formats. Live preview with one-click copy.
DesignFree · no sign-up
🔁Design
WebP to PNG / JPG
Convert WebP images to PNG or JPG, or other images to WebP.
DesignFree · no sign-up
✏️Design
SVG Editor
Full vector editor in the browser. Draw shapes, import SVGs, export clean code — no install required.
DesignFree · no sign-up
🎨Design
RGB to HEX
Convert RGB colour values to HEX codes and HSL instantly.
DesignFree · no sign-up
🖼Design
SVG to PNG
Convert SVG to sharp PNG at 1×–4× or an exact width, transparency kept.
DesignFree · no sign-up
🔄Design
PNG → SVG Converter
Vectorize raster images to scalable SVG using browser-based tracing. No upload. No account.
DesignFree · no sign-up
⭐Design
Favicon Generator
Make favicon.ico, Apple and Android icons and a web manifest from one image.
DesignFree · no sign-up
🎨Design
Colour Palette from Photo
Extract the main colours of a photo as HEX codes and CSS variables.
DesignFree · no sign-up
Free marketing tools
Make QR codes, build UTM links, create email signatures, set up SPF and DMARC, format LinkedIn posts and Instagram text, check emails for spam words and generate llms.txt.
𝓐Marketing
Instagram Fonts Generator
Bold, italic, script and gothic text to copy and paste into your Instagram bio and captions.
MarketingFree · no sign-up
📱Marketing
QR Code Generator
Create QR codes for links and text with custom colours. PNG and SVG download, no watermark, no expiry.
MarketingFree · no sign-up
🔗Marketing
UTM Link Builder
Build UTM-tagged URLs for Google Analytics campaign tracking. Source, medium, campaign in seconds.
MarketingFree · no sign-up
✉️Marketing
Email Signature Generator
Make a professional email signature for Gmail, Outlook and Apple Mail. Copy and paste — no sign-up, no watermark.
MarketingFree · no sign-up
📶Marketing
Wi-Fi QR Code
Make a QR code that connects phones to your Wi-Fi in one scan.
MarketingFree · no sign-up
𝗕Marketing
LinkedIn Text Formatter
Bold, italic, underline and strikethrough text for LinkedIn posts, comments and your headline. Copy and paste.
MarketingFree · no sign-up
⭐Marketing
Google Review QR Code
A QR code that opens your Google review form, for counters, receipts and cards.
MarketingFree · no sign-up
🤖Marketing
Robots.txt Generator
Build robots.txt with per-crawler choices for GPTBot, ClaudeBot and other AI bots.
MarketingFree · no sign-up
🚫Marketing
Spam Word Checker
Find spam trigger words, ALL CAPS and hype in an email before you send it.
MarketingFree · no sign-up
🛡Marketing
SPF Record Generator & Checker
Build an SPF record for your email services, or check a domain's SPF and its 10 DNS lookup limit.
MarketingFree · no sign-up
🔐Marketing
DMARC Record Generator & Checker
Create a DMARC record with report addresses, or check any domain's DMARC and what each tag means.
MarketingFree · no sign-up
🤖Marketing
llms.txt Generator
Build an llms.txt file that tells AI tools what your site is and which pages matter.
MarketingFree · no sign-up
✉Marketing
Subject Line Checker
Check a subject line for length, spam words and mobile cut-off, with an inbox preview.
MarketingFree · no sign-up
Free text tools
Count words and characters, and change text case in one click.
📝Text
Word Counter
Count words, characters, sentences and paragraphs. Get estimated reading time instantly.
TextFree · no sign-up
#Text
Character Counter
Count characters and check X, LinkedIn, Instagram, SMS and SEO limits.
TextFree · no sign-up
AaText
Case Converter
Convert text between UPPER, lower, Title, camelCase, snake_case and more in one click.
TextFree · no sign-up
TtText
Title Case Converter
Capitalise headlines in AP or Chicago style, or switch to sentence case.
TextFree · no sign-up
Free security tools
Generate strong passwords and SHA-256 hashes without sending anything to a server.
🔑Security
Password Generator
Generate strong, random passwords with custom length and character sets. Cryptographically secure — nothing stored.
SecurityFree · no sign-up
#Security
SHA-256 Hash Generator
Generate SHA-256 cryptographic hashes from any text — instantly, privately, in your browser. Nothing sent to servers.
SecurityFree · no sign-up
Free converters
Convert currencies with daily European Central Bank reference rates, and military time to AM/PM.
Free business tools
Create Australian tax invoices, add or remove GST, and work out profit margin and markup.
%Business
Profit Margin Calculator
Work out margin and markup, or the price you need for a target margin.
BusinessFree · no sign-up
🧾Business
Invoice Generator (AU)
Create an Australian tax invoice with ABN and GST and save it as a PDF.
BusinessFree · no sign-up
%Business
GST Calculator (AU)
Add 10% GST to a price or find the GST in a GST-inclusive amount.
BusinessFree · no sign-up
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