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kivo

All tools

144 tools. All free, no signup, and every one runs in your browser.

Showing all 144 tools

Merge PDF

Combine multiple PDFs into one file.

Split PDF

Extract pages into separate PDF files.

Extract PDF Pages

Keep only the pages you need.

Delete PDF Pages

Remove pages you don't want.

Rotate PDF

Fix sideways or upside-down pages.

JPG to PDF

Turn images into a PDF document.

PDF to JPG

Export PDF pages as JPG images.

Watermark PDF

Stamp text across every page.

Add Page Numbers to PDF

Number every page automatically.

Compress PDF

Make a PDF small enough to send.

Reorder PDF Pages

Put the pages in the right order.

Extract Text from PDF

Get the words out as plain text.

Remove PDF Metadata

Clear author, title and producer fields.

Sign a PDF

Draw it, place it, done.

Fill a PDF Form

Type in the boxes it already has.

Redact a PDF

Words covered are words gone.

Scan to text

Read the words out of a picture of them.

Compress Image

Shrink file size, keep the quality.

Resize Image

Change image dimensions instantly.

Convert Image Format

JPG, PNG and WebP, converted freely.

HEIC to JPG

Open iPhone photos anywhere.

Remove Image Metadata

Strip EXIF, GPS and device data.

Crop Image

Drag the box, take the crop.

Redact a Photo

Cover a face, an address, a screen.

Rotate Image

Turn a photo the right way up.

Flip Image

Mirror horizontally or vertically.

Blur Image

Soften an image or hide detail.

Pixelate Image

Reduce an image to blocks.

Watermark Image

Overlay your name or copyright.

Social Media Image Resizer

Exact sizes for every platform.

EXIF Viewer

See the hidden data in a photo.

Colour Palette Extractor

Pull the main colours out of an image.

Favicon Generator

Every favicon size from one image.

Carousel Splitter

One picture, swiped across slides.

Story Safe Zones

See what the interface will cover.

Screenshot Beautifier

A plain screenshot, worth posting.

Profile Picture Maker

Framed for the circle, not the square.

SVG Optimiser

Smaller markup, same drawing.

3D Model Viewer

Spin it, and read its numbers.

GLB to STL

From the web format to the printing one.

STL to GLB

From the printer to the web.

OBJ to GLB

One file instead of three.

GLB to OBJ

For tools that still want OBJ.

Reduce Polygons

Fewer triangles, same silhouette.

Remove Background

Cut the subject out, without uploading the photo.

JSON Formatter

Pretty-print and validate JSON.

JSON Minifier

Strip every unnecessary byte.

JSON Validator

Check JSON and see its structure.

JSON to CSV

Turn JSON arrays into a spreadsheet.

CSV to JSON

Turn a spreadsheet into JSON.

JSON to YAML

Convert JSON into readable YAML.

YAML to JSON

Convert config files to JSON.

XML to JSON

Turn XML into JSON.

JSON to XML

Turn JSON into XML markup.

CSV Cleaner

Fix a messy spreadsheet export.

CSV Column Analyzer

Understand a CSV before you use it.

XML Formatter

Indent and validate XML.

Base64 Encode

Encode text as Base64.

Base64 Decode

Decode Base64 back to text.

URL Encode

Percent-encode text for URLs.

URL Decode

Turn %20 back into readable text.

JWT Decoder

Read a token without handing it over.

JSON to TypeScript

Paste a response, get the interfaces.

Cron Expression Explainer

In English, and when it fires next.

Unix Timestamp Converter

Epoch numbers into real dates.

Colour Converter

Every format, and whether it's readable.

File to Data URI

Inline a small file, with the trade shown.

Excel to CSV or JSON

See the sheet before you convert it.

SQL Formatter

A readable query out of one long line.

Case Converter

UPPERCASE, camelCase, snake_case.

Remove Duplicate Lines

Keep only unique lines.

Sort Lines

Alphabetical or numerical order.

Remove Empty Lines

Delete the blank lines.

Find and Replace

Bulk replace across text.

Text Cleaner

Tidy messy pasted text.

Word Counter

Characters, words, reading time.

Character Counter

Count against real platform limits.

Reverse Text

Flip lines, words or characters.

Number Lines

Add sequential numbering.

Slug Generator

Turn titles into clean URLs.

Caption Counter

Every platform's limit at once.

Regex Tester

See what your pattern actually matches.

Markdown to HTML

Paste Markdown, get HTML.

HTML to Markdown

Messy HTML into readable Markdown.

Extract from Text

Every address in a wall of text.

QR Code Generator

Turn any link or text into a QR code.

Wi-Fi QR Code Generator

Guests join by scanning.

WhatsApp Link Generator

Chat links with a ready message.

Email Link Generator

mailto: links with subject and body.

SMS Link Generator

Open a text ready to send.

UTM Link Builder

Track where your traffic comes from.

Password Generator

Strong, random passwords.

Passphrase Generator

Memorable and still strong.

UUID Generator

Generate v4 UUIDs in bulk.

Secure Token Generator

API keys and random secrets.

Hash Generator

SHA-1, SHA-256, SHA-384, SHA-512.

Random Number Generator

Pick numbers in any range.

Random Picker

Draw winners fairly.

Lorem Ipsum Generator

Placeholder text for mockups.

Barcode Generator

Code 128 barcodes, downloadable as SVG.

Username Generator

Handles that aren't already taken.

Calendar Event (.ics)

An invitation any calendar opens.

Meta Tags & Open Graph

The head block, done properly.

Photo Collage

Several photos, one sheet.

Enlarge an Image

Bigger, without the mush.

Photo Filters

Colour and tone, live.

Convert Video

MP4, WebM or an animated GIF.

Video to Audio

Pull the sound out as MP3.

Compress Video

Small enough to actually send.

Trim Video

Cut a clip out, without re-encoding.

Convert Audio

MP3, WAV, M4A or OGG.

Trim Audio

Keep the part you need.

Normalise Audio Volume

One consistent loudness.

Join Audio Files

Several tracks, one file.

Voice Recorder

Record, and keep the file.

Find Invisible Characters

What's in the text but not on screen.

Escape a String

Safe to paste into code.

Number Base Converter

Decimal, hex, octal, binary.

HTML Entities

& both ways.

CSS Minifier

Smaller stylesheet, same rules.

Open a ZIP

Look inside an archive without extracting it.

Create a ZIP

Several files, one attachment.

Encrypt a File

Real encryption, not a zip password.

Decrypt a File

Open a .kivo file.

File Checksum

Prove a file arrived intact.

QR & Barcode Reader

See where a code goes before you tap it.

Password Strength

How long yours would actually last.

VAT Calculator

Add or remove VAT instantly.

Discount Calculator

Sale price and savings.

Margin Calculator

Profit margin from cost and price.

Markup Calculator

Price from cost plus markup.

ROI Calculator

Return on investment, annualised.

Break-even Calculator

Units needed to cover costs.

Freelance Hourly Rate Calculator

What you need to charge.

Percentage Calculator

Every percentage question at once.

Percentage Change Calculator

Growth or decline between values.

Profit Calculator

Revenue minus costs, as a margin.

Commission Calculator

What you earn on a sale.

Invoice Generator

A proper invoice, as a PDF.

Electronic Invoice XML

FatturaPA, without an accountant's portal.

Email Signature Generator

One that survives Outlook.

Date Calculator

Days between, or days from now.

Time Zone Meeting Planner

One hour that works for everyone.

Compound Interest Calculator

What regular saving turns into.