JustBloc

Add page numbers to a PDF with position, prefix, and starting number options.

Calculate age in years, months, and days from a date of birth.

Encode text to Base64 or decode Base64 back to readable text.

Estimate daily calories from body details and activity level.

Convert text between sentence, title, upper, lower, camelCase, PascalCase, snake_case, kebab-case, and more.

Pick colors and convert between common color formats.

Convert text-based subtitle files to SubRip SRT. Supports SRT, VTT, WebVTT, ASS, SSA, SMI, MicroDVD SUB, MPL2 SUB, and TXT with subtitle timings.

Detect common text encodings (UTF-8, UTF-16, Windows-1252) and convert text or subtitle files to UTF-8 downloads.

Convert text-based subtitle files to WebVTT. Supports SRT, VTT, WebVTT, ASS, SSA, SMI, MicroDVD SUB, MPL2 SUB, and TXT with subtitle timings.

Estimate crypto profit or loss from buy and sell prices.

Minify CSS snippets for quick copy and paste use.

Convert EPUB ebooks to plain text, extract readable chapters, and download the result as a TXT file.

Open an EPUB ebook, browse chapters, and read it with its original formatting in Reader view or as extracted plain text.

Add or remove GST from an amount and see the tax component instantly.

Create hashtag sets from a topic and platform style.

Paste HTML, keep visual styles or export text-only content, and create a PDF.

Edit HTML, CSS, and JavaScript with an instant sandboxed preview.

Load an image, click a pixel, and copy its HEX and RGB color values.

Compress one or many JPEG, PNG, and WebP images with quality and size controls.

Crop images by pixel coordinates and export the cropped file.

Convert images between JPEG, PNG, and WebP formats.

Add or edit text metadata in PNG and JPEG images.

Resize images by maximum width and height, then export the optimized result.

Convert JPG, PNG, and WebP images into a PDF with reorder, page size, orientation, and margin options.

Generate short profile bio ideas from a niche, tone, and call to action.

Run JavaScript snippets in a sandbox and capture console output.

Format, validate, and compact JSON for quick review and cleanup.

Check repeated words and phrase density from page copy.

Preview Markdown text in a clean formatted view.

Paste Markdown, preview readable content, and export it as a simple printable PDF.

Generate title, description, canonical, and Open Graph meta tags.

Estimate monthly mortgage payments, total repayment, and interest cost.

Edit subtitle cue text and timings, then export SRT or WebVTT.

Preview how link title, description, and image values may appear.

Apply different timing shifts to specific time ranges inside subtitle files.

Generate strong passwords with flexible length and character options.

Optimize PDF structure and reduce file size where possible for easier uploads and sharing.

Upload multiple PDF files, reorder them, and merge everything into one downloadable PDF.

View PDF title, author, subject, creator, producer, page count, file size, and dates.

Preview PDF page thumbnails, move pages up or down, delete unwanted pages, and download the rebuilt PDF.

Extract selected PDF pages using ranges like 1-3, 5, 8-10 and download a new PDF.

Render PDF pages as PNG or JPEG images and download single pages or a ZIP of all pages.

Extract selectable text from PDF pages, preview it, copy it, and download a plain TXT file.

Create a customizable QR code from a link or any text you paste, then download it as a PNG.

Upload a QR code image and extract the encoded text or link.

Test regular expressions against sample text.

Remove repeated lines, keeping the first or last occurrence, with an optional case-insensitive match.

Build a simple robots.txt file with sitemap and crawl rules.

Rotate all PDF pages or selected page ranges by 90, 180, 270, or -90 degrees.

Rotate images by right angles, flip horizontally or vertically, and download the result.

Estimate take-home pay after simple tax deductions.

Run SQL against a temporary SQLite database and view every result set.

Remove numbering issues, markup, SDH notes, and extra spacing from SRT subtitles.

Search symbols and view stock charts with candlesticks, volume, intraday intervals, indicators, events, and drawing tools.

Research a single stock with quote, valuation, fundamentals, 5-year annual financial statements, company profile, ownership, analyst, filing, and insider activity details.

Scan market presets and filter stocks by price, volume, valuation, dividend yield, beta, exchange, sector, and 52-week range position.

Preview embedded image metadata, then remove most of it by re-encoding the image.

Wrap WebVTT cue text with a color class for styled subtitle tracks.

Merge subtitles one-to-one, one-to-many, or many pairs with multiple merge modes.

Add or remove subtitle position tags for top, middle, or bottom caption placement.

Shift every subtitle cue forward or backward to resync captions with video.

Convert subtitle and plain text files to printable PDF documents.

Extract readable transcript text from subtitle files, including batch exports.

Open TXT, Markdown, CSV, log, JSON, XML, and other text files for reading, copying, and downloading.

Sort lines alphabetically, in reverse, or numerically, or shuffle them, with case-sensitive and remove-duplicate options.

Convert plain text into a multi-chapter EPUB ebook with title, author, language, per-chapter titles, an optional cover image, and a table of contents.

Paste text, choose title, font size, and margins, then download a printable PDF document.

Convert Unix timestamps to readable dates and dates back to timestamps.

Generate username ideas from keywords and preferred style.

Click on a PDF preview to place text, fillable input fields, or a drawn signature, then drag items into position and download the edited PDF.

Add a text watermark to every PDF page with opacity and rotation controls.

Count words, characters, sentences, and paragraphs in any text.

Generate title ideas for videos from a topic and angle.