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Free tools that work
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Calculators, converters, PDF, text, images and much more — each with its own page. Type your data and get the result right here, with no sign-up and without your data leaving your device. Need them in your own app? The same tools are available by API.
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7830tools
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7830 tools
🔎 OCR & Data ExtractionFree
Open an EML file
Open a saved email called Factura de julio and you see at once that Ada sent it, to whom, when, the message text and that it carries no attachments.
N
Runs in your browser
🔎 OCR & Data ExtractionFree
Find barcodes in a document
Scan a delivery note and every code on the page is found and decoded: Code 128, EAN-13, UPC-A and QR, each with its type and value, and QR codes with their…
N
Runs in your browser
🖼️ ImagesFree
Read EXIF data
See what a photo says about itself: the camera make and model, the exact second it was taken, its orientation and, when recorded, the GPS position.
N
Runs in your browser
🖼️ ImagesFree
Remove EXIF data
Strip the hidden data a photo carries, such as GPS coordinates, the camera model and the capture time, before you post it anywhere.
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Runs in your browser
🖼️ ImagesFree
Extract a color palette
Upload an image and get the handful of colors that define it, as hex values ranked by how much of the picture each covers, so the first swatch is the dominant…
N
Runs in your browser
🖼️ ImagesFree
Find the dominant color
Reduce a photo to one hex color, the one a viewer links with it at a glance, so a gallery can show a colored block before the image loads.
N
Runs in your browser
🖼️ ImagesFree
Generate a BlurHash
A photo becomes a short string, typically well under a hundred characters, that draws a soft blurred preview of its colors and composition before the real image…
N
Runs in your browser
🖼️ ImagesFree
Perceptual hash
A file checksum changes completely when a single byte differs; a perceptual hash stays close for the same photo resized, re-saved or cropped by a few pixels.
N
Runs in your browser
🖼️ ImagesFree
Generate avatars
Type a name and get its initials on a colored background, or give any steady value such as a user ID for a geometric pattern.
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Runs in your browser
🖼️ ImagesFree
Validate an image
An 8 by 4 pixel PNG of 74 bytes checked against a minimum width of 16 fails, with the reason spelled out.
N
Runs in your browser
🖼️ ImagesFree
Image to Base64
A tiny 74-byte PNG comes back as one line of text that starts with data:image/png, ready to paste where an external image cannot load: emails, PDFs, offline…
N
Runs in your browser
✍️ Text & AIFree
Readability score
Paste a paragraph and see several readability formulas side by side: three short sentences of 16 words still scored 26.9 on Flesch Reading Ease, rated…
N
Runs in your browser
🌐 TranslationFree
Format numbers & currency
1,234.56 and 1.234,56 are the same number written for two different readers: this tool applies each country’s separators, decimals and rounding, so 1234567.891…
N
Runs in your browser
🌐 TranslationFree
Localize dates
03/04/2026 is March 4 in Chicago and April 3 in São Paulo, so this tool writes each date the way its reader expects: 2026-07-21 becomes “21 de julho de 2026”…
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Runs in your browser
🌐 TranslationFree
Localize units
A product page for Berlin says 180 cm; the same page for Chicago needs inches, and 180 cm comes out as 70.866142 in.
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Runs in your browser
🕸️ Web Scraping & MonitoringFree
Read meta tags
Paste a page's source and see every tag in its head exactly as written: in the example, the title Precios, the description Tarifas del KIT and its sharing…
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Runs in your browser
🕸️ Web Scraping & MonitoringFree
Extract JSON-LD
See the structured data a page hands to search engines: every hidden block describing a product, a recipe or an article, exactly as the site wrote it.
N
Runs in your browser
🕸️ Web Scraping & MonitoringFree
RSS to JSON
Paste a feed or give its address and get every post as the same flat list: the sample Blog de ZARZA feed gives 2 items, Primer aviso and Segundo aviso, each…
N
Runs in your browser
📈 SEOFree
Check heading structure
Paste the HTML and see where the outline breaks: a page with two H1s and an H3 right after an H1 gets both problems named.
N
Runs in your browser
📈 SEOFree
Keyword density
See what your copy really emphasizes: in an eight-word text where hosting appears three times, it takes 37.5 % of the words.
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Runs in your browser
📈 SEOFree
Check the canonical tag
Paste a page's HTML or give its address and see the canonical it declares: in the example, https://example.com/p is found, present but not pointing to the page…
N
Runs in your browser
📈 SEOFree
Validate hreflang
See the hreflang block one page really emits: a page pointing to its Spanish version and to an x-default shows two alternates and a confirmed fallback.
N
Runs in your browser
📈 SEOFree
Validate a sitemap
Catch the addresses in a sitemap that make crawlers distrust it: in a two-entry file, no-es-una-url is listed back as invalid while the valid entry passes.
N
Runs in your browser
📈 SEOFree
Sitemap to JSON
Turn a sitemap into a clean list of addresses: an entry for example.com/a comes back with its lastmod of 2026-07-01, priority 0.8 and weekly change frequency.
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Runs in your browser
📈 SEOFree
Validate Open Graph
Catch a blank share card before anyone sees it: a page with og:title and og:description but no og:image or og:url is marked incomplete, with the missing tags…
N
Runs in your browser
📈 SEOFree
SEO readability score
See which sentences make a page hard to read: a 16-word, three-sentence text scores 26.9 on reading ease, rated difficult, with its hardest sentence listed…
N
Runs in your browser
🗂️ Data & FilesFree
CSV to JSON
Paste a CSV and every row becomes a named record: in the example, Ada's age of 36 arrives as a real number and "Lovelace, Ada" stays one value despite its…
N
Runs in your browser
🗂️ Data & FilesFree
JSON to CSV
Turn a list of records into a spreadsheet-ready CSV: in the example, Ada and Alan become 2 rows under three columns, the note with a comma stays in one cell…
N
Runs in your browser
🗂️ Data & FilesFree
XML to JSON
Turn XML into structured data without losing what the tags carry: attributes are kept with a clear prefix and repeated tags become lists.
N
Runs in your browser
🗂️ Data & FilesFree
JSON to XML
Feed data to a system that only reads XML: in the example, an order with id A-1 and total 85.00 plus the customer Ada becomes a document inside a factura…
N
Runs in your browser
🗂️ Data & FilesFree
YAML to JSON
Convert YAML into the curly-brace format apps read, or back again: in the example, a server block with host example.com and port 8080 keeps its nesting, and…
N
Runs in your browser
🗂️ Data & FilesFree
Validate JSON Schema
Check a data document against the shape it must follow and see where it breaks: every problem comes with the path to the failing value and the rule it violated.
N
Runs in your browser
🗂️ Data & FilesFree
Format JSON
Paste a squeezed line of data and get it back laid out level by level: in the example, b and a land on their own lines, the list under a is spread out, and the…
N
Runs in your browser
🗂️ Data & FilesFree
Minify JSON
Squeeze indented data into the smallest form that still means the same: in the example, four lines with a, b and a short list come back as one line with no…
N
Runs in your browser
🗂️ Data & FilesFree
JSON to HTML table
Show a list of records as a table people can scan: in the example, Ada and Luis become two rows under the headings nombre and rol, and the text Luis <b> stays…
N
Runs in your browser
🗂️ Data & FilesFree
Clean a CSV
A messy export with spaces around every value and a blank line in the middle comes back trimmed, with only its 3 real rows.
N
Runs in your browser
🗂️ Data & FilesFree
Remove duplicate rows
Remove repeated rows from a CSV and keep the first copy of each: in the example, ada@example.com appears twice, so the Madrid row stays and the Bogota row goes…
N
Runs in your browser
🗂️ Data & FilesFree
Merge & join CSV files
Join two CSV files on a shared column and choose which rows survive: only the matches, every row of the first file, or every row of both.
N
Runs in your browser
🗂️ Data & FilesFree
Transform a CSV
Reshape a CSV in one pass: rename columns, add computed ones and drop what should not travel. In the example, «nombre» becomes «first», the internal column…
N
Runs in your browser
🗂️ Data & FilesFree
Filter CSV rows
Keep only the rows you need from a CSV: in the example, asking for sales greater than 100 keeps ES with 120 and AR with 200 and drops MX with 80, leaving 2…
N
Runs in your browser
🗂️ Data & FilesFree
CSV statistics
A four-row sales file shows at a glance that one of its four sales cells is empty and that the rest run from 80 to 200.
N
Runs in your browser
🗂️ Data & FilesFree
Normalize dates
«03/04/25» can mean three different days; this rewrites dates as unambiguous ISO-8601, so 2026-04-03T10:30:00Z comes back as 2026-04-03T10:30:00.000Z, ready to…
N
Runs in your browser
🗂️ Data & FilesFree
Convert to UTF-8
Fix text where «Café del Mar» shows up as «Café del Mar»: the tool reverses UTF-8 that was misread as Latin-1 or Windows-1252 and returns the original letters…
N
Runs in your browser
🗂️ Data & FilesFree
Compare text
Paste two versions of a text and see exactly what changed: in the example, dos becoming DOS on line 2 and a new line 4 with cuatro give 2 changes, each with its…
N
Runs in your browser
🗂️ Data & FilesFree
Create a ZIP from text entries
Bundle up to 50 pasted text entries into one standard ZIP, with safe subfolders such as docs/readme.txt kept, ready to send or archive.
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Runs in your browser
🗂️ Data & FilesFree
Unzip a file
Open a ZIP and see what is inside before anything is unpacked: in the example, the archive holds hola.txt at 10 bytes and b.csv at 7 bytes.
N
Runs in your browser
🗂️ Data & FilesFree
Gzip
Shrink a text with gzip and see what you saved: in the example, a line repeating hola eight times drops from 39 to 28 bytes.
N
Runs in your browser
🗂️ Data & FilesFree
Mock data generator
Describe the columns you need and get rows that look real but belong to nobody: in the example, 3 rows such as Ana García, ana0@example.com, 2023-11-14, with an…
N
Runs in your browser
🗂️ Data & FilesFree
Markdown to HTML
Turn Markdown into clean, safe HTML: in the example, a # title, **bold** text and a link become a real heading, bold text and a working link.
N
Runs in your browser
🗂️ Data & FilesFree
HTML to Markdown
Turn cluttered HTML into Markdown you can read and edit: in the example, the heading becomes # Titulo, the bold word becomes **negrita**, the link keeps its…
N
Runs in your browser
🗂️ Data & FilesFree
HTML to text
Get only the words out of a piece of HTML: in the example, a heading, a red style rule, a paragraph and a script come back as Titulo Hola mundo, with the style…
N
Runs in your browser
🗂️ Data & FilesFree
Sanitize HTML
Strip the dangerous parts out of HTML before you show it: in the example, a script, an embedded frame, a hidden click action and a link to script code all go…
N
Runs in your browser
🗂️ Data & FilesFree
Minify HTML
Make a page lighter before it is served: comments and the spaces and line breaks between tags go, so the indented block in the example comes back on one line…
N
Runs in your browser
🗂️ Data & FilesFree
Minify CSS
A commented rule spread over five lines comes out as a single line of 24 characters. Spaces, comments, trailing semicolons and redundant zeros go, while the…
N
Runs in your browser
🗂️ Data & FilesFree
Minify JavaScript
Make a script lighter without setting up a build: in the example, a comment line and an indented function become one line, function suma(a,b){return a+b;}, with…
N
Runs in your browser
🗂️ Data & FilesFree
Convert units
5 km is 3.106864 miles. Convert lengths, weights, volumes, temperatures, areas and storage sizes between the units people use in shops, labs and kitchens, with…
N
Runs in your browser
🗂️ Data & FilesFree
Convert colors
#2b6251 is RGB 43, 98, 81, CMYK 56%, 0%, 17%, 62% and LAB 37.56, -22.79, 4.19. Enter one color in any of the five notations and get all the others back, worked…
N
Runs in your browser
✅ ValidationFree
Check an email address
Stop obvious typos at the form field: ada@example.com passes as well formed, while an address missing its @ or carrying two dots in a row is caught at once…
N
Runs in your browser
✅ ValidationFree
Find role emails
Separate real people from shared inboxes before you hit send: Billing@example.com is flagged as a role address in the billing category, while a named contact…
N
Runs in your browser
✅ ValidationFree
Fix email typos
Catch the slip a format check never sees: ada@gmial.com is flagged as a likely typo and ada@gmail.com is suggested, with a confidence of 0.78, so the person can…
N
Runs in your browser
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How it works
1
Get your key
Create an account with your email and add balance when you need it. No subscription, no sales call.
2
Call the endpoint
One authenticated POST. The API returns a task_id immediately — copy-paste snippets in five languages on every page.
3
Collect the result
Receive a signed webhook the moment it's ready, or fetch a signed link. A failed task is never charged.
Pay only for what you use
No subscription. Free tools run in your browser; paid tasks draw from your balance, which never expires.
Free tools
$0.00
On-device utilities — hash, QR, JSON, Text→PDF and more — run in your browser. No account, no limits.
Pay-as-you-go
Per task
$0.002+
The full API — 7800+ capabilities — billed only for what you run, from $0.002 per call. No monthly fee.
Balance
$10.00+
Top up your balance and spend it across web, API and the app. It never expires.