Tools

Tools for work & every day.

PDF, images, video, text, AI and calculators. Most files are processed right in your browser — no upload to a server.

107 tools Processed locally Free & no sign-up

90 run locally · 8 categories · 0 forced sign-ups

Category Processing Status Sort Only new tools

Newest tools

Freshly added tools you might not know yet.

Invoice generator

Generate professional invoices with a QR code.

PDF → images

Converts PDF pages to images (PNG/JPEG ZIP).

Images → PDF

Merge multiple images into a single PDF.

PDF rotator

Rotates or flips PDF pages.

PDF organizer

Remove or rearrange PDF pages.

PDF watermark

Adds a text watermark to a PDF.

Page numbering

Adds page numbers to a PDF.

PDF text extractor

Extracts text from a PDF (pdf.js).

Background remover

AI background removal from photos (ONNX MODNet).

Image upscaler

Upscale image resolution (2×/3×/4×) via canvas.

GIF maker

Create an animated GIF from a sequence of images.

NEWUnavailable on WEDOS

Screenshot URL

Take a screenshot of any web page.

Format converter

Convert PNG/JPG/WebP/BMP via canvas.

Image cropper

Interactively crop an image on a canvas.

Rotate/flip

Rotate or flip an image (90/180/270/flip).

Image filters

Grayscale, sepia, brightness, contrast, saturation.

Watermark

Add a text or image watermark.

EXIF metadata

View and remove EXIF data (incl. GPS).

Image collage

Combine multiple images into a collage (various layouts).

Favicon generator

Generates favicons (PNG multiple sizes + ICO).

Meme generator

Create a meme with top/bottom text (Impact).

Video thumbnail

Generates a thumbnail/frame from a video (no ffmpeg).

Audio waveform

Renders an audio volume waveform (Web Audio API).

Audio extractor

Extracts the audio track from a video (ffmpeg.wasm).

PDF

14

Slučování, dělení, komprese a převody PDF dokumentů.

PDF merger

Merges multiple PDF files into one.

PDF splitter

Splits a PDF into individual pages.

PDF compressor

Reduces the size of a PDF file.

PDF → Word

Extracts text from a PDF and builds a .docx.

HTML → PDF

Converts HTML code to PDF (html2canvas+jsPDF).

Invoice generator

Generate professional invoices with a QR code.

PDF → images

Converts PDF pages to images (PNG/JPEG ZIP).

Images → PDF

Merge multiple images into a single PDF.

PDF rotator

Rotates or flips PDF pages.

PDF organizer

Remove or rearrange PDF pages.

PDF watermark

Adds a text watermark to a PDF.

Page numbering

Adds page numbers to a PDF.

PDF text extractor

Extracts text from a PDF (pdf.js).

Unavailable on WEDOS

PDF password protection

Sets or removes a PDF password (qpdf).

Images

14

Komprese, úpravy a vylepšení obrázků.

Image compressor

Shrink an image via canvas (quality, JPEG/WebP).

Background remover

AI background removal from photos (ONNX MODNet).

Image upscaler

Upscale image resolution (2×/3×/4×) via canvas.

GIF maker

Create an animated GIF from a sequence of images.

NEWUnavailable on WEDOS

Screenshot URL

Take a screenshot of any web page.

Format converter

Convert PNG/JPG/WebP/BMP via canvas.

Image cropper

Interactively crop an image on a canvas.

Rotate/flip

Rotate or flip an image (90/180/270/flip).

Image filters

Grayscale, sepia, brightness, contrast, saturation.

Watermark

Add a text or image watermark.

EXIF metadata

View and remove EXIF data (incl. GPS).

Image collage

Combine multiple images into a collage (various layouts).

Favicon generator

Generates favicons (PNG multiple sizes + ICO).

Meme generator

Create a meme with top/bottom text (Impact).

Media

11

Práce s videem a zvukem — konverze, komprese, střih.

Video converter

Convert video between MP4 and WebM formats (ffmpeg.wasm).

Video compressor

Reduces video size (ffmpeg.wasm, adjustable quality).

Video trimmer

Select a part of the video and remove the rest (ffmpeg.wasm).

Audio converter

Convert audio between MP3/WAV/OGG/FLAC (ffmpeg.wasm).

Video thumbnail

Generates a thumbnail/frame from a video (no ffmpeg).

Audio waveform

Renders an audio volume waveform (Web Audio API).

Audio extractor

Extracts the audio track from a video (ffmpeg.wasm).

Video → GIF

Creates an animated GIF from a video (ffmpeg.wasm).

Video merger

Merges multiple videos (same codec/resolution, ffmpeg.wasm).

Target size

Calculates bitrate for a target video size.

Audio trim + normalize

Trims and normalizes audio volume.

Text

12

Překlad, shrnutí, Markdown a vizualizace myšlenek.

Text translator

Translate text between languages using AI.

Text summarizer

Create a concise summary of a long text.

Markdown editor

Edit and preview Markdown in real time.

Mind map

Visualize your ideas as a radial tree.

Text counter

Count characters, words, sentences and estimate reading time.

Letter case converter

Convert UPPER/lower/Title/camelCase/snake_case.

Lorem ipsum

Generate placeholder text (sentences/paragraphs/words).

Diacritics remover

Convert text without diacritics (ASCII fold).

Text to speech (TTS)

Read text aloud via the Web Speech API.

Line tool

Duplicates, sorting, blank lines, unique.

AI spell check

Fix spelling and grammar of Czech text.

AI email writer

Create an email from a prompt and chosen tone.

AI

6

Asistent, generování obsahu i obrázků pomocí AI.

AI assistant

Chat with an AI assistant for various tasks.

AI image analysis

Describe and analyze image content using AI.

SEO meta generator

Generate SEO titles and descriptions automatically.

AI image generator

Create unique images from a text description.

AI SQL generator

Convert natural language into SQL queries.

AI text Q&A

Ask anything about supplied text (context).

Dev

23

Regex, JSON, UUID, JWT a další pomůcky pro vývoj.

AI commit message

Generates a commit message from a diff (conventional commits).

AI regex generator

Describe a pattern, get a regular expression.

AI code explainer

Explains what code does, clearly and in English.

Regex tester

Test regular expressions in real time.

JSON formatter

Format and validate JSON structure.

CSS gradient editor

Create and edit CSS gradients interactively.

UUID generator

Generate random UUID v4 and v7.

JWT decoder

Decode and verify JWT tokens.

Base64 encoder/decoder

Encode and decode Base64 (text and files).

URL encoder/decoder

Encode and decode URLs (percent encoding).

JWT generator

Create and sign a JWT token (HMAC).

YAML ↔ JSON

Convert between YAML and JSON both ways.

CSV ↔ JSON

Convert between CSV and JSON both ways.

Cron expression builder

Build and explain a cron expression both ways.

Unix timestamp

Convert between Unix timestamp and date (with timezones).

Code diff

Compare two texts or code and view the changes.

CSS/JS/HTML formatter

Format or minify CSS, JS and HTML.

Contrast (WCAG)

Verify color contrast per WCAG AA/AAA.

QR generator

Create a QR code (text, URL, Wi-Fi, vCard).

OG meta generator

Generate Open Graph meta tags with a preview.

.gitignore generator

Build a .gitignore by language or tool.

Fake data generator

Generate test data and export CSV/JSON.

Color palette

Generate a palette (complementary, analogous…).

Security

10

Hashe, hesla, šifrování a kontrola certifikátů.

Hash generator

Generate MD5, SHA-256, SHA-512 hashes.

Password generator

Create secure custom passwords.

Text encryption

Encrypt and decrypt text using AES-256-GCM.

Steganography

Hide text in an image using LSB encoding.

SSL certificate info

Check validity and details of an SSL certificate.

Password strength

Estimate entropy and crack time of a password.

TOTP generator

Generate 2FA TOTP codes (RFC 6238) from a secret.

Password breach check

Checks whether a password has leaked (HIBP k-anonymity).

File encryption

Encrypts/decrypts a file with AES-256-GCM (Web Crypto).

Token generator

Generates random tokens (length, character set).

Calculators

17

Procenta, půjčky, převody jednotek a barev.

Percentage calculator

Quickly compute percentages, increases and decreases.

Loan calculator

Calculate installments and an amortization schedule.

Unit converter

Convert length, weight, temperature, volume and more.

Color converter

Convert between HEX, RGB, HSL and CMYK.

Number base converter

Convert between decimal, binary, octal and hexadecimal.

BMI calculator

Calculate your body mass index and category.

Discount calculator

Compute the price after a discount, even multiple discounts.

VAT calculator

Convert amounts between ex-VAT and inc-VAT (CZ rates).

Net salary calculator

Estimate net salary from gross (CZ rates).

Date difference

Calculate the difference between two dates in days.

Compound interest

Calculate compound interest returns.

Grade average

Calculate a weighted average of grades.

Fuel consumption

Convert between l/100 km and mpg.

BMR and calories

Basal metabolic rate and daily calorie intake.

Time calculator

Add and subtract time values.

IBAN converter

Converts a Czech account number to IBAN and back.

Birth number validator

Validates format and checksum of a Czech birth number.

BETA TESTING

Beta testing

Found a bug, something broken or missing? Tell us here — just one text is enough. Nothing more.

For anyone who finds a bug, reports it and includes their e-mail in the message, we have a beta-tester rank with perks — earlier access to new tools, report priority and small bonuses. Including an e-mail is purely voluntary; without it we still send the report, we just only reach out when there is a reason.